Geographic Information Systems
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underdark
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About

Open source GIS expert, OSGeo Charter, QGIS PSC member, and author of Learning QGIS and QGIS Map Design.

Interests: open source GIS, open data, spatial databases, GIS-T, data visualization for exploration

Twitter: @underdarkGIS

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All Questions Answers
Score Newest
answer
182
Difference between WGS84 and EPSG:4326
Nov 9, 2010
answer
160
Adding basemaps in QGIS
Feb 12, 2012
answer
131
Renaming attributes/fields in shapefile attribute table using QGIS
Oct 26, 2013
answer
105
How to Start Web Mapping?
Apr 4, 2011
answer
96
Differences between DEM, DSM and DTM?
Feb 1, 2011
answer
94
Visualising WKT geometry string in QGIS
Aug 9, 2011
answer
87
What are the pros and cons of PostGIS geography and geometry types?
Mar 2, 2011
answer
77
Building effective heat-maps?
Jul 24, 2010
answer
69
How to convert/typecast from Polygon to Multipolygon in PostGIS?
Sep 1, 2011
question
62
Visualizing speed of movement on static (= printable) map?
Oct 20, 2010
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Improving on 36,000 unanswered questions
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Locating GIS Stack Exchange Blog?
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What is this site about, really?
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Are contributions to conference proceedings considered to be "archival" publications?
10
How can I query all my data within a distance of 5 meters?
10
Should I check the z-score if the p-value of Local Moran's I is significant?
7
How to publish real-time open data
5
Join multiple line segments into one line - GIS

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