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LIUSUN
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02-23-2017
03-13-2024
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(0 Idea Submissions)Latest Contributions by LIUSUN
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Hello, I'm running a location allocation modelling to select 45 air pollution monitoring stations. I keep getting the warning message like Warning: Location "Location 48" in "Demand Points" is on a non-traversable network element position. ...... Warning: Location "Location 102" in "Facilities" is on a non-traversable network element position. The two inputs for the location allocation are demand points and facilities points (no road network involved). The same 341 points were used for both demand and facilities.The value of each point is the spatial variance (the semivariogram calculated by the moving window kriging). The variance was used as the weight for the demand points. For facilities, there is no weight. I specified the problem type of max attendance, choose 45 locations, impedance cutoff is 1500m. The goal is to capture as many as spatial variance using the 45 locations. Could anyone please tell me what might cause this warning message? Thank you very much Liu
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04-30-2019
12:03 PM
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That's exactly what I'm looking for. Thank you very much for your great help!!
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04-17-2019
10:39 AM
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Hi Eric, Thank you very much for your quick and detailed reply!! I've tried your method and it worked very well. I have 2 further questions: (1) for the "Maximum neighbors to include" when doing the moving window kriging. What does the neighbor mean? Does it mean the number of points (like neighbors of 10 = searching for 10 points around) or the unit of the map (like neighbors of 10=10 meters if the map is in a UTM projection)? (2) the output attribute table has prediction, strErr, Nugget, Range, PartSill. Which one is usually used to quantify the spatial variance, Nugget or Nugget+PartSill? Thank you very much!
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04-17-2019
10:00 AM
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Hello, I have a surface of air pollutant levels and I would like to calculate the spatial variability/semivariogram for each grid cell. Does anyone know how to do it in Arcgis? Thank you very much! Liu
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04-17-2019
07:46 AM
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Activity Feed
- Posted location allocation on ArcGIS Network Analyst Questions. 04-30-2019 12:03 PM
- Posted Re: How to calculate spatial variability/semivariogram for each grid cell? on ArcGIS GeoStatistical Analyst Questions. 04-17-2019 10:39 AM
- Posted Re: How to calculate spatial variability/semivariogram for each grid cell? on ArcGIS GeoStatistical Analyst Questions. 04-17-2019 10:00 AM
- Kudoed Re: How to calculate spatial variability/semivariogram for each grid cell? for EricKrause. 04-17-2019 09:49 AM
- Posted How to calculate spatial variability/semivariogram for each grid cell? on ArcGIS GeoStatistical Analyst Questions. 04-17-2019 07:46 AM
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