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Hi Shaun, First, I appreciate your responses and suggestions. To clarify the issue, I have many origin-destination pairs as you said, and a raster file spanning the entire study area with barriers I would like to measure distances traveled around. The barriers are land/marsh and have been assigned very large values to make them too costly to cross whereas all water cells have a very low value. I have been approaching the problem using the gdistance package in R, because it seemed to be a good fit for the problem. The raster file is all set to go, but because of the size of the geographic area, and the grid size being so small the file is too large for my computer to calculate the transition layer, and I have resorted to breaking it into memory-manageable chunks to calculate the distances, but this is tedious and many of the pairs overlap where I would break up the original raster so I need to break the csv into matching chunks as well which is equally tedious. my decision to use R rather than iterating through model builder was that I was having difficulty making the model and getting the tools to calculate distances rather than least cost paths, something that I felt would be straightforward and more accepting of my origin-destination pairs. I am looking into the MGET and circuitscape options now, but any assistance or suggestions for the model builder option would be welcome, as arcgis seems to do a better job with memory for raster file calculations. Thanks again, Adam
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04-05-2017
02:33 PM
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I have many many tagging locations and recapture locations formatted with starting latitude and longitudes and recapture coordinates in a csv file, and a raster file with the barriers weighted accordingly. I want the distances for each specific start to the corresponding recapture, not a raster of least cost paths between them all. Comfortable working in R language, raster file size prohibitively large for gdistance package
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03-23-2017
10:33 AM
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I recently began searching for ways to integrate my expanding R capabilities with my limited arcgis skills to make my workflow more time efficient, which brought me to the arcgis r bridge. The website and download states that later versions of arcgis and R are supported but that doesn't seem to be the case for me. Is there an easy fix or should I try another route.
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03-23-2017
10:27 AM
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