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seen Mar 29 '13 at 21:39

Apr
17
awarded  Popular Question
Apr
5
awarded  Tumbleweed
Mar
29
comment How to read this data file and convert it to raster format for analysis?
I am afraid that I can hardly handle Arcgis let alone QGIS. Is there some way to convert the file before importing it?
Mar
29
comment Distance from rivers-Zonal Statistics
I get the commnet output table empty
Mar
29
comment Why do ArcGIS Area Calculations not match Official Statistics?
My source is thematicmapping.org/downloads/world_borders.php. I project it at an equal area projection.
Mar
29
asked Distance from rivers-Zonal Statistics
Mar
29
asked How to read this data file and convert it to raster format for analysis?
Mar
21
asked Which Geographic Transformation to use for WGS_84 to D_Sphere?
Mar
21
comment Why do ArcGIS Area Calculations not match Official Statistics?
I use ArcGIS 10.1. To change projection I go to Data Management tools->Projections and Transformations->Raster-Define Projection. Is this the right procedure? The differences lie in the range of 10-30%, thus not in a systematic way.
Mar
20
asked Why do ArcGIS Area Calculations not match Official Statistics?
Mar
18
comment Distance from waterways
Thanks for all the comments. I ll will try both and see if they generate significan differences.
Mar
18
comment Zonal Statistics-Weighting
Thanks for the comments. I will try the equal area projection. Unfortunately I am new to ARC GIS so I already have difficulties with already, let alone moving to a different software.
Mar
18
comment Distance from waterways
THanks! It sound very feasible and I ll try it instantaneously. One more question. As to calculating the area do I need to somehow to weight the cells for each given latitude? i.e. the cells near the equator represent a larger are than the cells near the pole.
Mar
18
awarded  Student
Mar
18
asked Distance from waterways
Mar
18
comment Zonal Statistics-Weighting
I should clarify that I work with ARCGIS 10.1
Mar
18
asked Zonal Statistics-Weighting