1,636 reputation
731
bio website nowebsite
location planet earth
age 94
visits member for 2 years, 11 months
seen Nov 17 at 21:42

trying to survive a phd


Apr
9
comment Calculation to convert db data to Lat/Lng degrees
i think you probably need to know teh bounding box of the area. do you remmember if the equation had this info ?
Apr
8
comment Converting shapefile to raster: Character attributes
It didn't took forever. what machine are you using?
Apr
1
comment R Raster package loop over pixels
why don't you use the method to extract the values from the nc file and calculating directly the slope, without storing the array f the original data, just the slope output?
Feb
17
comment R generated files getting scrambled on import in ArcGIS
show us the output of the command str(SubData) in R
Jan
9
comment export spatial information from table that is joined to a shapefile in QGIS 2.0
check this tutorial: qgis.spatialthoughts.com/2012/03/…
Jan
9
comment Summarize values from a raster brick by latitude bands in R
Your question is very similar to this one: gis.stackexchange.com/questions/49176/…
Nov
26
comment Spatial Interpolation - defining a minimum value for agroup of points
@whuber I have no info on the rate, but lets assume it is not constant. Does it mean that there is no spatial interpolation method that allows me to use incomplete data? or the use of certain points were we just tell the method that for this points the minimum value observed is M.
Oct
3
comment Spatial interpolation - appropriate method to estimate the accuracy of the surface
I already take into account the validation by using a sample of the observations. I want to know if there is more I can do, e.g. combine with other type of measurements (e.g., spatial distribution of the observations) and give one value for the quality/accuracy of the surface.
Aug
21
comment How to reclassify raster inside polygon mask, leaving values outside as they are?
check this question: gis.stackexchange.com/questions/40474/…
Aug
13
comment Optimising Min/Max temporal raster search in python/gdal
try to use the matrix (extract it from the raster) and look for optimization methods to find the max and min value of big matrix in python.
Aug
10
comment Image segmentation in SAGA Tutorials
Thanks @klewis !
Jun
25
comment problems with r.sun from GRASS
where did you put your files? in C:\Users\Leticia\AppData\Local\Temp\sextante\ ??
Apr
30
comment Topographic Wetness Index
thanks @whuber !
Apr
28
comment How to speed up band math in R 'raster' package?
are you going to do any more calculations in R? R is not the best tool for imagery. if not, you should make the stack operation in gdal.
Apr
28
comment Resample, ArcGIS: How do I avoid resample taking into acount NoData values?
how many cells the island occupies in the original format? what is your original resolution? what is the new resolution?
Apr
22
comment Google Earth export from QGIS
this might help you: stevencanplan.com/2009/converting-shapefiles-and-kml-files
Apr
22
comment convert from HDF to GeoTiff
I end up just using GDAL, but yes I am working on windows.
Apr
21
comment convert from HDF to GeoTiff
Thanks guys! Didn't work exactly how you suggested but it was close: gdal_translate -of GTiff HDF4_EOS:EOS_GRID:"MOD13C2.A2001001.005.2007078152825.hdf":MOD_Grid_monthly_CMG_‌​VI:"CMG 0.05 Deg Monthly NDVI" ndvi.tiff
Apr
17
comment What to set spatial reference to after projecting to GCS_WGS_1984
I gave you the wrong tool name, it's the "Project" tools(Projections and Transformations >> Feature >> Project)
Apr
17
comment How to dissolve polygons and aggregate their data in QGIS?
What you are looking for is a dissolve polygons tool.This might help you out: gis.stackexchange.com/questions/26657/…