Datamodel

• Vector• Raster• Lattice• Tin• Image• tabel

Vector

Raster: GRID

Tin

Images

The Netherlands

• Stereographic projection• Ellipsoid of Bessel• Amersfoort• False easting 155000, false northing 463000• NAP• http://www.rdnap.nl

Datasets of the Netherlands

• Top10vector & Top10NL• GBKN (via wms)• Bodemstatistiek CBS• LGN (4)• AHN (1) + proefset versie 2• Aerial photography• Alterra Soilmap/Geomorphology

Datasets of the Netherlands

• Rijkswaterstaat: Ecotopes• Nationaal wegenbestand: Roads• Administrative maps:• Bonne blaadjes (historic topography)• Dino• And many more….

metadata

• www.nationaalgeoregister.nl• www.provinciaalgeoregister.nl

Top10vector & Top10NL

• Vector (10, 50)• Raster (25,50,250)

• Cover shapefile Geodatabase

BodemstatistiekFunctional landuse

• CBS• Top10 base• 1989, 1993,1996, 2000, • 2003, 2006, 2008

AHN

• www.ahn.nl• 16 m2 min #1pt• 5cm sd=15cm

Techniques

http://www.minvenw.nl/rws/mdi/geoloket/ahn.html

Aerial photography

• Oblique• Stereo• Ortho

• Jaarlijks (DLG)

protocols

• Open Geospatial Consortium (OGC)

• Web Map Service (WMS)• Web Feature Service (WFS)• Web Coverage Service (WCS)

server/client (OGC)

• UMN mapserver• GeoServer• ArcGIS Server• Thredds (TDS)

• Mscross• Google earth• Arcgis Desktop• Arcexplorer• uDig• gvSIG

Google Earth

• KML/KMZ

What is RS

Remote Sensing is the science or the technique of deriving information about objects at the Earth surface from images using (parts of) the electromagnetic spectrum

• Measuring electromagnetic energy (light), reflected or emitted• Non-destructive method, no physical contact• Surveying the spatial distribution of objects• Determining properties of objects• Monitoring the dynamics of features

Global datasets

• MSS/TM5/TM7• ASTER + ASTER GDEM• GTOPO30/SRTM30/3/1• VMAP0

MSS/TM5/TM7

TM5_mrsid

• RGB=7,4,2• 30 meter• 23.4 Gb

TM7_mrsid

• RGB=7,4,2• 15 meter• 117 Gb

World DEM

• GTOPO30• SRTM30• SRTM3• SRTM1

GTOPO30

• 30 arcseconds

Shuttle Radar Topography Mission (SRTM)

http://www.jpl.nasa.gov/srtm/mission.htm

• Uses radar interferometry (SIR-C/X-SAR)• Maps 80% of the Earth in 11 days• Horizontal accuracy: 20 m• Vertical accuracy: 16 m• Resolution: 1 arc second (ca. 30 m)

ASTER/MODISProduct DescriptionThe Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)is one of a number of instruments on board the Terra platform,which was launched in December 1999. ASTER provides fourteenspectral bands with 15- to 90-meter resolution depending on bands.ASTER does not acquire data continuously, and its sensors are activatedonly to collect specific scenes upon request.

The instrument consists of three separate telescopes, each of whichprovides different spectral range and resolution. The VNIR (visible and near-infrared)sensor provides 4 bands at 15-meter resolution. The SWIR (short-wave infrared)sensor provides 6 bands at 30-meter resolution. The TIR (thermal infrared) sensorprovides 5 bands at 90-meter resolution. The swath width for all sensors is 60kilometers. ASTER data is generally available in the Universal Transverse Mercator(UTM) projection, although some individual scenes may be cast to analternative projection. The data is referenced to the World Geodetic Survey(WGS) system of 1984 (WGS84). Files are in the HDF-EOS format,and are distributed on CD-ROM, DVD, DLT, 8-mm tape, and File Transfer Protocol (FTP).

ASTER GDEM

http://www.gdem.aster.ersdac.or.jp/http://gdex.cr.usgs.gov/gdex/

VMAP0

• Based on DCW• 1:1000000

Mars datasets

• Themis IR• DEM