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Wow, it sounds like a good idea. Thank you so much for your reply, Jay. I really appreciate it. You will have to do this in three solves. One for each type of facility you want to find. So set up a CF layer with the incidents (block centroids) and then load in the first type of facilities and solve for 1 closest. Export the results. Then, unload/remove the facilities and load in the next set and solve for 1 closest and export. Repeat for the third set. Alternatively you can create the CF layer with the incidents and copy this layer twice. Now you have three layers. Load each set of demand points to them and solve for 1 closest and export/merge the results. Jay Sandhu
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05-13-2013
09:43 AM
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Hi there, I am working on a project that needs to find out the three closet supermarkets belonging to different companies around each census block centroid. I am using the Network Analyst ??? Closet Facility Tool, using census block centroids as incidents, supermarkets as facilities and setting up the number of facility as three. The problem is, however, for any three nearest facilities to be found, I want them to belong to different companies. I have no idea how to define constrains on facility types (different companies) during this analysis. Could anyone have any idea? Many thanks in advance.
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05-09-2013
07:22 AM
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Hi there, I am trying to create service area polygons for census block centroids within a city. I used 800 metres as the default break but one of my polygons came out looking very strange with a distance of 92 metres (which is smaller than the default break). Please find the screenshot below. Could anyone help me to figure out the problem? Many thanks in advance. [ATTACH=CONFIG]23533[/ATTACH]
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04-15-2013
02:46 PM
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Thanks a lot for your reply, Peter. It seems that we have to use math tool instead of the raster calculator. I hope ESRI would acknowledge this issue and solve it in the future. No solution. Continues to be unstable. We frequently see the results with larger negative numbers from a raster calculator function - no error message, but clearly incorrect results. We have seen this particular problem for several years, not just ArcGIS 10.1. If we use the 'multiply' tool instead of raster calculator when we have this happen, it works correctly.
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01-23-2013
11:20 AM
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I experienced similar situation when multiplying two binary raster (same extent, same cell size). The result seems odd as there are cells with negative value (e.g., -21414). I am wondering whether this is a function error associated with ArcGIS 10.1 and whether your problem has been solved. Thank you.
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01-23-2013
07:04 AM
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I want to measure two points which are stored in a geographic coordinate system using the measure tool on the Tools toolbar in ArcGIS 10. But as described in the ArcGIS Help document, "If your spatial data references locations with latitude and longitude, ArcMap draws the data by simply treating the latitude-longitude coordinates as planar x,y coordinates." "Degrees of latitude and longitude are not consistent units of measure for area, shape, distance, and direction." It seems to me that the distance calculated on data in a geographic coordinate system would be incorrect. However, in ArcGIS 10, "When measuring in a data frame with a geographic coordinate system, the default measurement type is Geodesic," which is "the shortest line between any two points on the earth's surface on a spheroid". Does it mean that I can use the measurement tool to measure distance on unprojected data anyway? Since I don't know what the coordinate system of my data is, I cannot set up a good map scale on a layout as ArcMap doesn't know what units the coordinates are using. Can someone please help me figure this out? Many thanks in advance.
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05-25-2012
06:49 PM
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