Latest Contributions by ShaunWalbridge

On my 10.1 install, Spyder 2.2 installs without problems and is directly usable with arcpy without any path changes necessary. cheers, Shauin ... View more

Miguel, The Shannon diversity index was originally designed to handle species diversity, but it has since been applied to other problems like land cover classification. Where you see 'species' you can think 'land cover class' and the same concepts apply. Vegan includes details on how its calculations are computed, and these shouldn't vary between different kinds of entities -- species or land cover classes. Diversity indicies measure similarity in categorical variables, and have been used to measure many things outside of ecology including land cover and demography. cheers, Shaun ... View more

I don't believe this is an ArcGIS specific problem, but this question on StackOverflow seems to have a solution. cheers, Shaun ... View more

If you use the Near tool, the output includes NEAR_FID which should answer #1, and NEAR_DIST which should provide #2. Depending on your input data, you may need to first run multipart to singlepart to separate your geometries into individual polygons. cheers, Shaun ... View more

The Marine Geospatial Ecology Tools (MGET) include a geoprocessing script, "Calculate Species Diversity Index for Polygons" that can compute Species Diversity Indices for polygon coverage data. Under the hood, that function uses the R vegan package to compute the measures. cheers, Shaun ... View more

Great solution Curtis. This also can be a time that the collections module can come in handy, it provides OrderedDict for cases where you want things sorted: import collections d = dict((x.name, x) for x in layers) od = collections.OrderedDict(sorted(d.items())) Now od can be accessed sequentially and retains the relationship between name and layer. ... View more

See the recent addition of supplemental multidimensional tools, which allows for importing of OPeNDAP datasets directly: http://blogs.esri.com/esri/arcgis/2013/05/24/introducing-the-multidimension-supplemental-tools-2/ ... View more

Concur that these techniques both work well, I used both when creating a global 1km hydrologic model. One issue to keep in mind is determining the correct size of erroneous polygons to remove depends on the scale of the input data and the nature of the terrain you're working with. ... View more

It doesn't seem to exist in this lib esriSRProjCS_NAD1983_UTM_Zone_1N works fine for me, the reason it isn't listed in the autocomplete you listed is two-fold: You're looking at the 'NAD1927' section, and the list isn't sorted numerically -- so all values starting with '1' will be grouped together, and 1 will be next to 10, not 2. cheers, Shaun ... View more

Have you confirmed that the WAMP environment is running against the same Python interpreter as ArcGIS, and can you perform any other operations successfully? Note that ArcGIS for Server is required for network-based access to ArcGIS. ... View more

Shaun, did you locate a different version? The one on ArcScripts is a .dll (presumably built with VB6, *not*  VBA). I just used the version listed on ArcScripts, and played around with the tool in a cursory fashion, I should've performed all analysis steps prior to commenting. It does *mostly* work, and can compute its weights, eigenvalues, and consistency ratio without issue, but the final step of combining these into a raster output fails with the error "AddRastersMapAlgb: Automation error Unspecified Error". This is, as you mentioned, due to the changes in architecture between releases. ... View more

If you let me know the source of the SRTM tiles, I can create a similar mosaic here to try with, or try selecting just the tiles around the erroneous high values -- I don't need the whole set, just an example area which exhibits the behavior, if you'd like to figure out the specific problem in doing both steps simultaneously.The drop in elevation you are seeing is expected: when you perform cubic re-sampling, you're averaging over a neighborhood of elevation values for each output cell. In both cases -- Rob Hijman's Bioclim, and SRTM -- the original data providers share versions sampled at other resolutions (e.g. SRTM30). It may be possible to side-step these issues entirely by using one of these versions as your first step, as both sources have already assessed the resampling in the methods of their dataset production. ... View more