Latest Contributions by ThomasDilts

Hi. I'm excited to see this new forum. I hope that it takes off. I've been building a tool that connects all pairs of points using least-cost path analysis. I rely heavily on the Cost Path as Polyline and Cost Distance tool which are in the Legacy toolset in Spatial Analyst -> Distance. The Cost Path as Polyline tool returns the warning "This tool is deprecated and will be removed in a future release. The Optimal Path as Line tool provides enhanced functionality and performance". My tests are indicating that these tools are not equivalent and the actual result from the Cost Path as Polyline is superior to the Optimal Path as Line tool. What I'm seeing is that the cost-distance and path length from A to B and B to A is consistent with the Cost Path as Polyline but differs with the Optimal Path as Line tool. The Optimal Path as Line tool also generalizes the lines in ways that don't seem consistent. This seems like a major potential loss despite the additional bells and whistles of the Optimal Path as Line tool. I don't feel like the Optimal Path as Line tool is consistent enough for my use, unfortunately. The tool that I'm building (have built) has calculates least-cost paths for all pairs of points similar to the Landscape Genetics toolbox by Thomas Etherington (at least one of his tools) and Pathmtrix which ran in ArcView 3.3. Etherington, T. R. (2011). Python based GIS tools for landscape genetics: visualising genetic relatedness and measuring landscape connectivity. Methods in Ecology and Evolution, 2(1), 52-55. Ray, N. (2005). PATHMATRIX: a geographical information system tool to compute effective distances among samples. Molecular Ecology Notes, 5(1), 177-180. ... View more

Hi, I'm running ArcGIS Pro 3.2.1 on a Windows 10 Enterprise 10.019045 with an i7, 3.6 Ghz, 16 Gb RAM. When I run the Distance Accumulation tool in the geoprocessing tools (Spatial Analyst Toolbox) I get an output map that is flipped where north is south and south is north (see attachment). I confirmed that the raster values are circular from south 180 being 0 instead of 180. This same problem happens in the deprecated Euclidean Direction tool.  Is this is a known bug or is there some setting that I have to set now to make north 0?  I've run Euclidean Direction for years and have never seen this issue.  Thoughts? ... View more

The new Maxent tool in ArcGIS Pro is great.  It provides great graphics and model evaluation statistics. One thing that would make it better is if it provided AIC (Akaike's Information Criterion) as ENMTools does - https://github.com/danlwarren/ENMTools AIC provides the ability to select between models with different feature types (linear, quadratic, step, etc.) ... View more

The line density tool has a default symbology so that the raster when added to ArcGIS Pro it shows purple. The problem is that it makes it appear that areas that have lines are showing up as white background. This immediately makes the user think that the algorithm is wrong. The symbology also persists. If I remove the layer and add it back it will render it the same. I would recommend Esri immediately abandon this default symbology and switch to something else. The default raster symbology is much better. ... View more

Add a checkbox to the Zonal Statistics tool to ensure that all features are rasterized, including small ones. Currently, the tool will generate a warning saying "WARNING 010566: Some zones may not have been rasterized." ... View more

It would be wonderful if Esri had a simple website that shows with which version a new geoprocessing tool is added.  Right now each version has a "whats new" page, but it would be great to see these pulled together into a single source so that we can verify that a tool exists or doesn't depending upon the version that the user has. https://pro.arcgis.com/en/pro-app/latest/get-started/whats-new-in-arcgis-pro.htm For example, the Wikipedia page on ArcGIS shows each version's release date and includes a link to the "what's new" page, but it would be great to see all of this information pulled together into a single searchable table. https://en.wikipedia.org/wiki/ArcGIS   ... View more

In Spatial Analyst we have the local toolset for working with individual pixels, neighborhood tools for groups of pixels, and zonal statistics for irregular groups of cells/polygons, but there is no tool that transforms entire rasters.  What about a toolset that transforms rasters into percentiles, quantiles, z-scores, standardizes, etc.?  This would be super useful and would be a great asset to the existing tools. ... View more