User johanvdw

38 votes

Why does GPS positioning require four satellites?

answered Jul 30, 2011 at 21:45

26 votes

Accepted

Given a terrain, how to draw the stream flow path?

answered Sep 15, 2011 at 7:47

24 votes

Identifying Coordinate System of Shapefile when Unknown?

answered Oct 3, 2013 at 10:03

18 votes

Accepted

Calculating Topographic Ruggedness Index in ArcGIS Desktop?

answered Feb 11, 2011 at 7:46

15 votes

Why is the 'straight line' path across continent so curved?

answered Mar 6, 2011 at 19:06

12 votes

Accepted

Opensource solutions for finishing maps

answered Jul 4, 2012 at 12:27

11 votes

Accepted

Installing SAGA GIS 2.1

answered Sep 1, 2013 at 21:33

11 votes

Accepted

Open Source Tool capable of reading Esri File Geodatabase (.gdb)?

answered Dec 9, 2010 at 9:04

11 votes

How could I generate a CRS field inside the GeoJSON object created by Leaflet layer.toGeoJSON?

answered Dec 17, 2013 at 18:36

10 votes

Accepted

Determining statistical relationships between rasters using R vs ArcGIS Desktop?

answered Jan 5, 2011 at 12:32

10 votes

Are any fictional worlds available in some GIS format?

answered Sep 4, 2011 at 16:52

9 votes

Land Cover Feature Extraction from Satellite Imagery

answered Sep 26, 2011 at 10:42

9 votes

Accepted

R spplot tutorials

answered May 29, 2012 at 20:24

9 votes

What is the best format to encode polygons such as lakes?

answered Oct 2, 2013 at 18:04

8 votes

Seeking freely available GIS books?

answered Dec 9, 2010 at 9:08

8 votes

Open source methods for kriging?

answered Aug 13, 2010 at 8:21

7 votes

Surface distance on DEM between two coordinates

answered Dec 9, 2010 at 12:52

7 votes

Accepted

Web mapping software for a huge raster time series?

answered Jan 14, 2012 at 1:33

7 votes

Are there any attempts to replace the shapefile?

answered Feb 20, 2012 at 20:45

7 votes

Generating random but believable digital elevation model?

answered Feb 28, 2012 at 8:22

7 votes

Accepted

How to automatically plot intermediate contours with QGIS, GRASS GIS or SAGA GIS?

answered May 4, 2012 at 11:09

7 votes

Accepted

How to install Mapserver on Ubuntu?

answered Jun 24, 2013 at 9:16

6 votes

Accepted

Converting ms-access database into easy to use spatial database

answered Sep 22, 2012 at 13:45

6 votes

Performing Ordinary Kriging in SAGA via QGIS SEXTANTE Plug-in?

answered Jun 21, 2012 at 19:48

6 votes

Problems with NA values when reading .DEM file with R 'raster' package in Windows

answered Sep 21, 2011 at 12:39

6 votes

What is Lanczos resampling useful for in a spatial context?

answered Sep 2, 2011 at 12:35

6 votes

How can I programmatically determine if a shapefile contains points, polygons, or lines?

answered Feb 24, 2011 at 17:34

6 votes

Interpolation of Three Data Points

answered Jan 13, 2011 at 10:00

5 votes

How to generalize and vectorize a LandUseClassification raster file?

answered Aug 16, 2012 at 21:09

5 votes

Creating shapefile showing footprints of Rasters?

answered Jun 6, 2012 at 6:40

Stack Exchange Network

173 Answers

Why does GPS positioning require four satellites?

Given a terrain, how to draw the stream flow path?

Identifying Coordinate System of Shapefile when Unknown?

Calculating Topographic Ruggedness Index in ArcGIS Desktop?

Why is the 'straight line' path across continent so curved?

Opensource solutions for finishing maps

Installing SAGA GIS 2.1

Open Source Tool capable of reading Esri File Geodatabase (.gdb)?

How could I generate a CRS field inside the GeoJSON object created by Leaflet layer.toGeoJSON?

Determining statistical relationships between rasters using R vs ArcGIS Desktop?

Are any fictional worlds available in some GIS format?

Land Cover Feature Extraction from Satellite Imagery

R spplot tutorials

What is the best format to encode polygons such as lakes?

Seeking freely available GIS books?

Open source methods for kriging?

Surface distance on DEM between two coordinates

Web mapping software for a huge raster time series?

Are there any attempts to replace the shapefile?

Generating random but believable digital elevation model?

How to automatically plot intermediate contours with QGIS, GRASS GIS or SAGA GIS?

How to install Mapserver on Ubuntu?

Converting ms-access database into easy to use spatial database

Performing Ordinary Kriging in SAGA via QGIS SEXTANTE Plug-in?

Problems with NA values when reading .DEM file with R 'raster' package in Windows

What is Lanczos resampling useful for in a spatial context?

How can I programmatically determine if a shapefile contains points, polygons, or lines?

Interpolation of Three Data Points

How to generalize and vectorize a LandUseClassification raster file?

Creating shapefile showing footprints of Rasters?