Advanced Mapping Techniques

All rights reserved. © 2009 Tableau Software Inc.All rights reserved. © 2009 Tableau Software Inc.All rights reserved. © 2009 Tableau Software Inc.

Advanced Mapping Techniques

Austin Dahl, Dirk Karis, Robert MortonTableau Software

All rights reserved. © 2009 Tableau Software Inc.All rights reserved. © 2009 Tableau Software Inc.

Agenda

•Big Picture•Review of 4.0 Features•Custom Geocoding

Geographic Hierarchies

Creating new role: Regions

Augmenting an existing role: UK Postal Codes

Adding a new hierarchy: FIPS Codes•WMS – Web Mapping Service•Leveraging Geospatial Capabilities of Databases


Mapping ServiceMapping ServiceGeocodingGeocoding

Big Picture



Big Picture, Example



+ Data


DemoBasics


Review of 4.0 FeaturesBasic Mapping and Challenges

•Creation

Double click on any geocoded field to get a map

Use Show Me•Resolving Ambiguity•LOD Best Practices

Put full hierarchy on LOD

e.g. Country, State, Zip•2008 Conference talk by Austin Dahl has lots more

http://conference.tableausoftware.com/2008/sessions/training


Agenda








Custom Geocoding


Built In Geocoding

Existing HierarchiesCountry (Name, FIPS 10, ISO 3166-2, ISO 3166)

CMSA Area Code State (Name Abbreviation)

County Zip Code

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Hierarchy Examples

C:\Program Files\Tableau\Tableau 5.0\Local\data\ZipCode.tds

Country State Zip Code

C:\Program Files\Tableau\Tableau 5.0\Local\data\AreaCode.tds

Country Area Code


Custom Geocoding

•What you can do

Add new hierarchies

e.g. Sales Regions, Airports, Store Locations

Add new sub-levels to existing hierarchies

e.g. Cities

Add new locations to an existing level

e.g. UK Postal Codes•What you cannot do

Put existing levels under your new levels

Add additional alternate names to existing levels

Change the location for an existing entry•But, you can duplicate existing levels and do all of the above


What You Need

•CSV File with:

• Unique ID (no duplicates)

• Optional: IDs of containing levels (a.k.a. foreign key)

• Latitude

• Longitude

•Optional: Schema.ini file

• IDs should be Text

• Even numeric fields like zip code

• Latitude and Longitude should be Double

See http://msdn.microsoft.com/en-us/library/ms709353(VS.85).aspx for details on Schema.ini


Simple GeocodingLittle League World Series


LLWSRegion Encoding CSV File


Two Locations

SELECT [LLWS#csv].[Runner-Up Region] AS [Runner-Up Region],

[LLWS#csv].[Runner-Up Score] AS [Runner-Up Score],

[LLWS#csv].[Winner Region] AS [Winner Region],

[LLWS#csv].[Winner Score] AS [Winner Score],

[LLWS#csv].[Year] AS [Year]

FROM [LLWS#csv]


Two Locations

SELECT [LLWS#csv].[Runner-Up Region] AS [Region],

[LLWS#csv].[Runner-Up Score] AS [Score],

[LLWS#csv].[Year] AS [Year],

'Runner-Up' AS [Winner - Runner-Up]

FROM [LLWS#csv]

UNION

SELECT

[LLWS#csv].[Winner Region] AS [Region],

[LLWS#csv].[Winner Score] AS [Score],

[LLWS#csv].[Year] AS [Year],

'Winner' AS [Winner - Runner-Up]

FROM [LLWS#csv]


Augmenting the Built In GeocodingUK Postal Codes


UK Postal CodesClean Up


UK Postal CodesSchema.ini


Adding Geocoding HierarchiesFIPS Codes

Desired Hierarchy

Country (Name, FIPS 10) FIPS State (Abbreviation, 2 Digits)

FIPS County (3 Digits, 5 Digits)

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Adding Geocoding HierarchiesFIPS Geocoding Files

FIPS CountyFIPS State


Adding Geocoding HierarchiesFIPS Schema.ini


Custom Geocoding Best Practices

•Clean the data

Remove blank or duplicate rows

Check the data types

Format for leading zeros if needed•Use Schema.ini to enforce types and column names•Store in a common directory

Use subfolders for different locations or roles

Keep your CSV files•Order the fields with the most readable name first•Use Tableau to connect to it as a sanity check


Sharing Your Custom Geocoding

•One-off:

Save to TWBX and send

Import from TWBX•Group Wide

One person imports everything

Distribute My Tableau Repository\Local Data

(Advanced) It is possible to have TDS files in Local Data reference in-house databases

•On Tableau Server

Publish and custom geocoding will get sent if needed.


Agenda







GeocodingGeocoding Mapping ServiceMapping Service

WMS


WMS Basics

1

2

3


WMS Examples

http://wms.jpl.nasa.gov/wms.cgi?


WMS Examples

http://apps1.gdr.nrcan.gc.ca/cgi-bin/worldmin_en-ca_ows


WMS Examples

http://wms1.ccgis.de/cgi-bin/mapserv?map=/data/umn/germany/germany.map&&


Agenda






All rights reserved. © 2009 Tableau Software Inc.All rights reserved. © 2009 Tableau Software Inc.All rights reserved. © 2009 Tableau Software Inc.

Tapping Into Geospatial Databases

• Contains• Intersection• Distance


Summary

•Custom Geocoding

Add your locations, augment Tableau locations•WMS

In house via ArcGIS and others; numerous public servers

Different layers than the Tableau built-in•Geospatial Databases

Calculations of Distance, Intersection, Containment

Geographic Types


Questions

?

•Austin Dahl [email protected]•Dirk Karis [email protected]•Robert Morton [email protected]


Resources

•Geospatial Data Sets

National Atlas - http://www.nationalatlas.gov/atlasftp.html

NOAA - http://csc-s-maps-q.csc.noaa.gov/hurricanes/download.jsp

•Upload Shapefiles to SQL Server 2008

Shape2SQL - http://www.sharpgis.net/page/SQL-Server-2008-Spatial-Tools.aspx

•Edit and Manipulate Shapefiles

OpenJUMP - http://www.openjump.org/

Advanced Mapping Techniques

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