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Mar
2
awarded  Popular Question
Feb
21
comment Elevation color ramps for DEMs in QGIS
@Catlike: in 2.12.3, you can get there by Settings > Style Manager > Color ramp tab > green plus symbol on right (tooltip says "add item").
Feb
21
revised Elevation color ramps for DEMs in QGIS
Fix broken link, and update cited text
Feb
21
suggested approved edit on Elevation color ramps for DEMs in QGIS
Nov
13
awarded  Self-Learner
Sep
17
comment Why does gdalwarp's cubicspline method expand into nodata areas?
@mdsumner - Thanks for the feedback. I'll try to add some more detail tomorrow. My climate surfaces are actually national grids, but this spilling into nodata happens at all nodata boundaries with cubic spline. I chose this spot for my screenshot because I was drawn to it by a cell with a spline-extrapolated value of -50 degrees celsius for mean annual temp... another thing that makes me wary of this method (and presumably one of the reasons you suggest avoiding warping if possible). My current work is inland (alps), so I might avoid the worst of it anyway.
Sep
17
comment Why does gdalwarp's cubicspline method expand into nodata areas?
@mdsumner - using equal area grids is convenient for my work, mainly because it avoids latitudinal biases that can be a pain to control when using a geographic SRS. It sounds like you're suggesting projection prior to analysis should be avoided at all costs... or is there something about the way I'm doing it that's a problem?
Sep
17
comment Why does gdalwarp's cubicspline method expand into nodata areas?
Thanks @MichaelMiles-Stimson. I'm reluctant to treat nodata as zero - wouldn't that pull the spline down (or up) towards zero inappropriately at the coastal boundary? I'd planned on using cubic spline as it "is the best method for representing ... phenomena such as temperature" (ref) - though I'm open to being told otherwise. At any rate, I'm not losing cells but gaining them - the pink/purple layer is the cubic spline result, which stretches out a number of cells into nodata territory. Have I misunderstood you?
Sep
17
revised Why does gdalwarp's cubicspline method expand into nodata areas?
added 40 characters in body
Sep
17
asked Why does gdalwarp's cubicspline method expand into nodata areas?
Sep
17
revised Speed of various raster data formats
grammar and typos
Sep
17
suggested approved edit on Speed of various raster data formats
Aug
20
comment gdal_calc.py raster reclass equivalent of ArcGIS reclass or r.reclass in grass
--calc shouldn't be passed twice - I believe the first will be ignored.
Mar
12
comment Write raster with its attribute table and symbology
What's the question?
Feb
28
comment How to apply Mapnik style for OSM data in ArcMAP?
See O_M's comment above.
Feb
19
comment export list as shp in R
It's going to be pretty painful typing up all that code in order to work with your example data. In future, maybe consider including the code itself :)
Jan
31
answered Exporting Grid from R to use it in ArcGIS
Jan
31
accepted buffer and union in R without reducing to a multi-polygon
Jan
29
comment Join spatial polygons by code in R
I can't help you with ggplot... I find base and lattice much more straightforward for mapping. Good luck though.
Jan
29
comment Join spatial polygons by code in R
@pacomet You can merge by code. First, pad info$codigo with leading zeroes with info$codigo <- sprintf('%05d', info$codigo) and then merge(muni, info[, c('area', 'codigo')], by.x='CODIGOINE', by.y='codigo'). However, there are two records for code 12004 in info (see subset(info, codigo==12004)). You'll have to remove one of these first.