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bio website staff.acecrc.org.au/~mdsumner
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R, Manifold, GDAL, also interested in Python, topojson/D3 and NetCDF/HDF


1d
comment Plotting Netcdf data. How to get right projection?
Can you provide the file? Probably you need to rasterize
Mar
13
comment How to import R-generated .gri/.grd raster files in GRASS?
Doh! Had no idea that hdr could write VRT like this . . . :)
Mar
13
comment Getting latitude and longitude raster from DEM
read the dem with raster() and use functions coordinates, xFromCol, yFromRow, xyFromCell etc.
Mar
9
comment constrain random points with a polygon in R using sp library
Put the polygon in as the first argument to spsample rather than the grid.
Mar
6
comment Choosing Open Source GIS solution to embed into bespoke windows application?
Try Manifold.net
Feb
21
comment How to import several GeoTiff files into R?
Try library(raster); r <- stack(list.files(pattern="tif$", full.names=FALSE)) ## you can convert to sp/rgdal format if need be
Feb
8
comment Simulation of random flight paths for helicopters
Another candidate is MUCflights
Feb
7
comment Simulation of random flight paths for helicopters
The package adehabitatLT has a number of simm.[x] functions for simulating animal tracks. Also fwiw, the SpatioTemporal Task View lists packages with support for tracking data.
Feb
3
comment Calculate shortest path not on land but over sea
Some prior discussions: stackoverflow.com/questions/8120594/… and stat.ethz.ch/pipermail/r-sig-geo/2010-January/007491.html and stat.ethz.ch/pipermail/r-sig-geo/2008-March/003313.html
Jan
30
comment How to read *.adf files into R?
Please change the title to something intelligent and accurate.
Jan
29
comment Georeferencing using corner coordinate
I would first point gdalinfo at one of the files, it may well be a GeoTIFF anyway
Jan
26
comment Manifold GIS Scripting/Queries — query a web page and scrape page source?
This might be relevant, but generally I wouldn't be using Manifold directly for the web scraping part. If you can get it working with Python I'd do it externally first before trying to run it inside Manifold itself, though that should also work. georeference.org/doc/a_flashy_demo_web_queries_and_kml.htm
Jan
7
comment Identify nearest neighbor in grid in R (spatial)
See sp::gridIndex2nb or raster::adjacent
Jan
1
comment How to find if two gps tracks were from the same trip?
Dupe: gis.stackexchange.com/questions/81551/matching-gps-tracks
Dec
24
comment Software for opening .img files
.img is not enough to identify a format, it is ambiguous at best. Note that some software ignore the extension,or only use it as part of the evidence, and some formats ship without an extension at all
Dec
21
comment Runnig of LSMA method in ENVI sotware
What is runnig, lsma, envi and ppi? Details please.
Dec
20
comment Is there an R equivalent of NEAR in ESRI ArcGIS?
What nearest neighbour packages? kdtree in nabor is likely to be the most efficient, but if you need ellipsoid distances you can roll your own with spDistsN1 in sp.
Dec
6
comment Raster to polygon using R
What has this got to do with R? I would focus on that, you give no details on the crash, your computer, or the code.
Dec
1
comment Is esri-leaflet officially an Esri project on github?
And title-case fixes that? :)
Dec
1
comment How to merge an excel file with a shapefile in r
Provide the code you are using and more detail about the files. This is pretty straightforward using tools in sp. Also, generally it's better to use rgdal::readOGR rather than maptools::readShapePoly since you'll also get projection metadata automatically (if it's there).