GDAL & WebGL: European Commission, Joint Research Center, Ispra
-
Upload
petr-pridal -
Category
Technology
-
view
1.304 -
download
5
description
Transcript of GDAL & WebGL: European Commission, Joint Research Center, Ispra
![Page 1: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/1.jpg)
Research & Development with WebGL, Closure, GDAL & MapRank
Joint Research Centre - European Commision, November 22, Ispra, Italy.
Petr Pridal <[email protected]>
![Page 2: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/2.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 3: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/3.jpg)
![Page 4: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/4.jpg)
Closure ToolsWebGL Earth
MapTiler ClusterGDAL2Tiles on steroids. GeoSearch with ranking.
3D digital globe. JavaScript Toolset.
![Page 5: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/5.jpg)
WebGL EarthFree and open source 3D digital globe
for web and mobile devices
!
beta
![Page 6: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/6.jpg)
HTML5 & WebGL
• HTML5 <canvas> WebGL extension
• Based on OpenGL ES
• Supported by NVidia, ATI, Intel on desktop
• HW acceleration on mobile devices
• Firefox 4+, Chrome 9+, Opera, Safari
• Internet Explorer: with Chrome Frame
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 7: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/7.jpg)
WebGL: Shaders in GLSL
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 8: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/8.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 9: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/9.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 10: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/10.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 11: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/11.jpg)
![Page 12: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/12.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096Inspired by OpenLayers.Layer.GoogleNG(done by Andreas Hocevar)
Compliant to Google TOS?
![Page 13: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/13.jpg)
Try the demo application:
www.webglearth.comKLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 14: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/14.jpg)
Mission of the project
• User friendly (dragging, zooming, ...)
• Keep it simple & maximally web oriented
• Raster data from prerendered tiles, WMS, existing tile APIs and TileCache, GeoServer...
• “NoServer” = o!ine usage & cloud
• Calculations from CPU to GPU. Preprocess!
• Open-Source (GPLv3), Community powered
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 15: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/15.jpg)
Open Source project
• Simple JavaScript API
• Embed <script src=“...../api.js”>
• Mashup with your own tiles, custom WMS, overlays, markers and popups
• The full codebase + demo app sources on GitHub, object oriented, documented code, manual describing internals available
• Contributors: KlokanTech, CampToCamp, AI2 Spain, BIMServer.org, NOAA
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 16: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/16.jpg)
JavaScript API: Demo
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 17: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/17.jpg)
JavaScript API
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
• Embedding of the 3D globe
• Custom base maps and overlays with adjustable transparency (tiles + WMS)
• Camera API, flyTo, bbox
• User interaction and events
• Markers & popups
• <canvas> is part of HTML DOM
![Page 18: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/18.jpg)
![Page 19: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/19.jpg)
![Page 20: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/20.jpg)
Codebase: we, weapp
• Demo application (www.webglearth.com) completely open-source, API exports too
• Compiled with Closure Compiler with types: http://blog.klokantech.com/2010/12/closure-compiler-for-openlayers-3x.html
• Documented (google style guideline)
• Technically, anything is possible :-)
• Manual describing the implementation details: http://data.webglearth.com/doc/
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 21: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/21.jpg)
![Page 22: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/22.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
Object hierarchy
![Page 23: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/23.jpg)
“Keep it simple” design
• Sphere with diameter 1.0
• WGS84 coordinates used without ellipsoid transformation (a la Google Maps, OSM, etc.)
• Textures in Spherical Mercator (EPSG:3857, EPSG:900913)
• Clip stack for megatextures with lookup
• Segmented plane as the model
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 24: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/24.jpg)
Segmented plane
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 25: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/25.jpg)
Terrain
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 26: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/26.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 27: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/27.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 28: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/28.jpg)
Vector data (direct rendering)
• Now: rasterized only (WMS, tiles with Mapnik, ...). Raster tiles must be there for aerial data.
• Future: direct rendering (from GeoJSON, KML, WFS, ...)
• Sharing code for loading data formats with OpenLayers 3, Leaflet, Polymaps?
• Vector Tiles - Google MapsGL
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 29: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/29.jpg)
Future: Google MapsGL
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 30: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/30.jpg)
Future: Mobile devices
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 31: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/31.jpg)
Problems: drivers + CORS
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
• Long list of blacklisted graphic cards
• June 2011: Introduced restrictions on cross-domain textures for WebGL :-(
• CORS HTTP Header: Access-Control-Allow-Origin: *
• http://enable-cors.org/ or chrome --disable-web-security
• Support only in Chrome 15+ (beta), Firefox 8 (11/2011)
• Workaround for now: HTTP proxy
• Tiles hosted on your own server runs always!
![Page 32: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/32.jpg)
Try it: 10 minut cookbook
• JavaScript API: check examples
• Prepare data (one of):
• WMS / TMS / WMTS in EPSG:900913
• Convert any GeoTIFF with GDAL2Tiles / MapTiler
• Copy everything on your web server
• Display in any modern web browser
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 33: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/33.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
Support, open-source contracted development:Klokan Technologies: http://www.klokantech.com/
Try it at:http://www.webglearth.com/
Project website, mailing-list, documentation:http://www.webglearth.org/
Plans for integration with OpenLayers 3.0
![Page 34: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/34.jpg)
Closure ToolsWebGL Earth
MapTiler ClusterGDAL2Tiles on steroids. GeoSearch with ranking.
3D digital globe. JavaScript Toolset.
![Page 35: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/35.jpg)
Closure ToolsOpenSource JavaScript Toolset
developed by Google Inc.
"
![Page 36: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/36.jpg)
"
Compiler LibraryTemplates Linter Stylesheets JS Test
http://code.google.com/closure/
(Coding Style Guidelines)
![Page 37: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/37.jpg)
It is all about compiler...
1. Compiles readable JavaScript into compressed machine-readable JavaScript: dead code removal, function inlining, etc.
2. JSDoc Tags: typos, wrong use of a @constructor, wrong type of a variable, misuse of a field annotated with @private and @protected, etc.
3. A reusable JavaScript library, such as OpenLayers, exports public API - and the compiler optimizes the internal code.
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
http://goo.gl/H6twe
![Page 38: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/38.jpg)
It is all about compiler...
4. Unused parts of the library stripped. Application dependencies solved during compilation.
5. Constants to remove unwanted functionality: Mobile WebKit only, no Quirks mode support, compilation without support of IE6
6. Debugging with FireBug possible even for the compiled version
7. Dynamically loadable modules, additional functionality loaded only when required.
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
http://goo.gl/H6twe
![Page 39: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/39.jpg)
Hello world
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
goog.require('goog.dom');
function sayHi() { var newHeader = goog.dom.createDom('h1', {'style': 'background-color:#EEE'}, 'Hello world!'); goog.dom.appendChild(document.body, newHeader);}
goog.exportSymbol('sayHi', sayHi);
![Page 40: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/40.jpg)
How to start?
• Easiest is to get plovr - where all the tools are packed into one .jar application.
• Run java -jar plovr.jar serve config.json and use it with HTML as <script src="http://localhost:9810/compile?id=hello"></script>
• Plovr: Hello world + skeletons at GitHub: https://github.com/klokantech/closure-library-plovr-hello-world-skeletons/
• Closure Library websites: http://code.google.com/closure/library/
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 41: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/41.jpg)
![Page 42: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/42.jpg)
Where it excels?
• Complex online applications - any serious work done in JS
• More developers working on the same code
• High peformance app + mobile apps
• Libraries and APIs
• :-( no fast copy & paste hacking
• :-( steep learning curve, smaller community
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 43: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/43.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
Read more at:http://code.google.com/closure/
Plovr.jar - the “packed” toolset:http://plovr.com/
The book: Closure Library, The Definitive Guide
Blog post: http://goo.gl/H6twe
![Page 44: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/44.jpg)
Closure ToolsWebGL Earth
MapTiler ClusterGDAL2Tiles on steroids. GeoSearch with ranking.
3D digital globe. JavaScript Toolset.
![Page 45: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/45.jpg)
#
GDAL2Tiles on steroids.
MapTiler Cluster
![Page 46: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/46.jpg)
![Page 47: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/47.jpg)
• MapTiler is an application for rapid online map publishing
• Input: raster geodata (GeoTIFF, JPEG2000, MrSID, ECW, Erdas HFA, BSB, ...). Output: jpeg/png tiles
• Support for existing georeference (World Files, WKT, EPSG,...). Transformation (warping) of projections possible.
• Standards: OSGEO Tile Map Service Specification - TMS, comming OGC WMTS:
• Web viewers (OpenLayers, Google Maps API) + applications
• KML files (Google Earth)
• iPhone + iPad + Android native applications
• ArcGIS - with extensions (ArcBruTile). 10.1+ native WMTS support
MAPTILER - WHAT IS IT?
![Page 48: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/48.jpg)
![Page 49: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/49.jpg)
![Page 50: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/50.jpg)
![Page 51: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/51.jpg)
![Page 52: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/52.jpg)
![Page 53: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/53.jpg)
![Page 54: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/54.jpg)
![Page 55: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/55.jpg)
![Page 56: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/56.jpg)
![Page 57: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/57.jpg)
![Page 58: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/58.jpg)
![Page 59: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/59.jpg)
![Page 60: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/60.jpg)
![Page 61: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/61.jpg)
![Page 62: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/62.jpg)
![Page 63: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/63.jpg)
![Page 64: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/64.jpg)
![Page 65: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/65.jpg)
![Page 66: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/66.jpg)
GOOGLE MAPS OVERLAY DEMO
![Page 67: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/67.jpg)
OPENLAYERS DEMO
![Page 68: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/68.jpg)
GOOGLE EARTH DEMO
![Page 69: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/69.jpg)
MAP TILER GENERATES TILES:
![Page 70: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/70.jpg)
NECESSARY TRANSFORMATIONS AND WARPING
GEODETIC COORDINATESLATITUDE LONGITUDEWGS 84 (EPSG:4326)
SPHERICAL MERCATORMETERS
EPSG:3785 / EPSG:900913
PYRAMID COORDINATESXYZ PIXELS / ZOOM
WEB VIEWERS
TILE INDEXXYZ TILE / ZOOM
TILE MAP SERVICE
![Page 71: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/71.jpg)
SPHERICAL MERCATOR:TILE PROJECTION AND COORDINATES
NOT ONLY IN GOOGLE MAPS!
• Popular on the web: Google Maps, Microsoft Bing Maps, Yahoo Maps, OpenStreetMap, ...
• Lat/Long WGS84 (GPS devices) datum coordinates always displayed to users - KML
• Map rasters are projected by a global Mercator projection: “Spherical Mercator”. EPSG:900913 / EPSG:3857 (meters)
• Conformal, cylindrical. Cropped to square (maximal latitude ~ 85.05 degrees), WGS84 ellipsoid is sphere!
![Page 72: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/72.jpg)
OPEN-SOURCE ALTERNATIVES: PREGENERATING X CACHING TILES
• Generating from raster input:
• MapTiler & GDAL2Tiles
• MSR MapCruncher
• Generating from features (vectors)
• Mapnik
• GMapCreator,
• ...
• Caching tiles from WMS servers (MapServer, GeoServer):
• TileCache.org (Python)
• GeoWebCache.org (Java Servlet)
• Commercial alternatives
• License per server (ArcGIS Server)
![Page 73: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/73.jpg)
EXTREMELY FAST ONLINE MAPSFOR THOUSANDS OF PEOPLE
• Easy hosting: only static files / or raster blobs in a database
• Extremely fast delivery, highest-quality output possible (you have more time for rendering), SLA for up to 99.99% availability
![Page 74: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/74.jpg)
Our software is used ...
• ... in: web applications, mashups, native mobile applications (iPhone/iPad/Android), hardware appliances and 3D visualizations
• ... for: standard base maps, aerial imagery, coverage maps, thematic maps, marine navigation, by pilots in airplains, on the ground during disaster events, ...
• ... by: Google, NOAA, NASA, CERN, Vodafone, T-Mobile, Orange, Three, United Nations, and thousands of developers
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 75: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/75.jpg)
PARALLELIZED RENDERING:MAPTILER CLUSTER
• Parallelized rendering on Multi-Core processors or even on computer clusters (Amazon EC2 supported)
• Speed-up the rendering on modern computers
• Rendering on a computer cluster (Amazon EC2) - price: 0.1 USD / hour / core
• Publishing of tiles on a world-wide CDNs (Amazon S3/CloudFront, Google App Engine, Azure, SimpleCDN) - fast multi-threaded upload for tiles possible
•Merging of huge raster datasets into a seamless map a la Google Maps on a computer cluster:
• Fast parallelized rendering and merging of large data collections
• Cluster parallelization based on MPI
• Test of MapReduce approach (via Nokia labs Disco project) for cl
ients
![Page 76: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/76.jpg)
MapTiler Cluster vs GDAL2Tiles
• Fast rendering: multi-core CPU & MPI cluster
• Direct merging of several input files
• Excellent visual quality
• Heavily optimized PNGs/JPEGs tiles to speed up the delivery and save disk space
• Precise "data over-zooming"
• Various coordinate systems supported
for cl
ients
![Page 77: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/77.jpg)
![Page 78: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/78.jpg)
![Page 79: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/79.jpg)
![Page 80: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/80.jpg)
![Page 81: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/81.jpg)
![Page 82: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/82.jpg)
![Page 83: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/83.jpg)
![Page 84: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/84.jpg)
![Page 85: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/85.jpg)
![Page 86: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/86.jpg)
![Page 87: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/87.jpg)
Runs under Windows, Linux and Mac OS X + GDAL2Tiles
You can try it on the FOSS4G LiveDVD!
Community: MapTiler User Group
MapTiler Cluster, commercial support, integration, customization
http://www.maptiler.com/
WWW . MAPTILER . ORG
![Page 88: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/88.jpg)
Closure ToolsWebGL Earth
MapTiler ClusterGDAL2Tiles on steroids. GeoSearch with ranking.
3D digital globe. JavaScript Toolset.
![Page 89: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/89.jpg)
$
Geosearch with ranking.
![Page 90: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/90.jpg)
• Research, scientific articles, work on Ph.D. thesis (Petr Přidal), Computer Science + Geodesy and Cartography
• Alternative projects tested in OldMapsOnline.org (R&D project in MZK):
• Lucene with GeoTemporal Ext. (LGTE) from DigMap.eu
• Alexandria Digital Library
• TimeMap.net (ECAI.org)
• Google GeoSearch API
• Knowledge of traditional GIS search methods (PostGIS, ...)
GEOGRAPHICAL SEARCHING
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
Result: Development of a new geographical search engine for map collections.
![Page 91: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/91.jpg)
• Map-driven interface: Simple. Intuitive. Web 2.0. Users love it!
• Combined queries: Where, When, Who & What
• Results sorted geographically with an advanced spatial ranking algorithm.
• Instant search. Immediate delivery of the results by moving the map or typing.
• It is fast. Even for large databases (million+ records).
CORE FEATURES
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 92: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/92.jpg)
• Indexing metadata in MARC, DublinCore, ISO 19139 formats, ...
• Batch import or harvesting: OAI-PMH or OGC CWS
• Numerical geographical boundaries necessary! (MARC 034, DublinCore DCMI) - enrichment with Geoparser or Georeferencer tools
• Possible customization of the user interface, integration into products or websites
• For developers: REST API (JSON format), queries following OpenSearch.org
METADATA & CUSTOMIZATION
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 93: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/93.jpg)
Try it at: http://demo.mapranksearch.com/
![Page 94: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/94.jpg)
Try it at: http://rumsey.mapranksearch.com/
![Page 96: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/96.jpg)
TOUCH INTERFACE
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 97: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/97.jpg)
• MapRank ranking: an advanced algorithm calculating similarity of geographical area of query and area covered by every document and combining it with map scale, time range, predefined categories and traditional full text search.
• Data indexing implemented specifically to provide ranked real-time results even for large databases. Traditional R-Tree indexing or Lucene are failing.
• Server component: FastCGI, C++
• Default user interface developed with Closure JavaScript Library + Closure Compiler.
MAPRANK RANKING & SCALABILITY
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 98: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/98.jpg)
Geoparser
Text parsing and semi-automatic assignment of bounding boxes to map records with detectable geonames (gazetteer), known physical size and map scale.
Georeferencer
Crowdsourced georeferencing. Higher accuracy, more outputs beside geometadata such as visualization, 3D view, comparing of maps, OGC WMS for use in GIS.
ENRICHMENT OF METADATA
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
![Page 99: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/99.jpg)
![Page 100: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/100.jpg)
![Page 101: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/101.jpg)
![Page 102: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/102.jpg)
![Page 104: GDAL & WebGL: European Commission, Joint Research Center, Ispra](https://reader034.fdocuments.in/reader034/viewer/2022050815/54869241b47959d30c8b5295/html5/thumbnails/104.jpg)
KLOKAN TECHNOLOGIES - Museo Sans 500
KLOKAN TECHNOLOGIES - Museo Sans 500 ItalicKLOKAN TECHNOLOGIES - Museo Sans 700
KLOKAN TECHNOLOGIES - Museo 300
KLOKAN TECHNOLOGIES - Museo 500KLOKAN TECHNOLOGIES - Museo 700
CMYK100 75 10 0
RGB0 81 151
#005096
Petr Pridal <[email protected]>
Thank you!Questions, ideas?
Cooperation on OpenSource and R&D?Coding week for OpenLayers3 & WebGL Earth?Interest in applications of MapTiler / MapRank?