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Apr
10
reviewed Approve How do I export data points from topology checker into an attribute table?
Mar
11
awarded  Yearling
Mar
9
comment Will Grass GIS 6s atmospheric correction take raster as input for atmospheric parameters
GRASS 7 takes a visibility map as input. But, AFAIK the optical depth, ozone and water vapor are expected to be pretty constant over an area of a few 100 km, at the hour and date of the image.
Mar
8
comment Why can't I enter decimals in QGIS r.water.outlet?
A side note: -73 35 45.5 != -73.35455. You have to convert DD MM SS to decimal degrees.
Mar
4
answered creating a single point from coordinates
Mar
2
answered whats wrong with my exported raster reclassify map in grass?
Feb
29
answered convert GPS coordinates to SRID coordinates in spatialite
Feb
21
awarded  Custodian
Feb
21
reviewed Approve how to divide a Area shapefile into multiple segment, so that each segment will be a seperate feature in attribute table?
Feb
18
comment Atmospheric Correction for multiple Landsat-8 scenes
I recently used i.atcorr on Landsat 8 images. Worked fine, AFAIK. The issue you mentioned refers specifically to Windows not finding the executable. The module itself (on Linux) accepts and processes Landsat 8.
Feb
15
revised QGIS convert long integers stored as string to integer
added 323 characters in body
Feb
15
comment QGIS convert long integers stored as string to integer
The workaround on the spatialite-users maillist involved just two SQL commands: SELECT InvalidateLayerStatistics(); (*) SELECT UpdateLayerStatistics();
Feb
14
answered QGIS convert long integers stored as string to integer
Dec
26
answered How can I calculate flow length in QGiS/GRASS?
Dec
13
comment grass r.watershed to larger rivers parallel lines to same stretch
Why fillnulls? What is the source of the DEM?
Dec
12
comment grass r.watershed to larger rivers parallel lines to same stretch
I think you need to start by checking the elevation raster that you used for input to r.watershed
Nov
28
answered How to calculate the distance to the nearest water source?
Nov
28
answered Regarding Atmospheric correction and Elevation DEM Projection system
Nov
26
comment Resetting 'cat' column in GRASS?
Just make a new grid layer of however many rows and columns you want with v.mkgrid.
Nov
26
answered Resetting 'cat' column in GRASS?