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Have you thought of doing a spatial join? If you right-click on your point layer, you can choose Join, then Spatial Join instead of ''join by attribute''. You can then ''join'' the closest pipe to your point. There's also a toolbox doing the same thing. The spatial join will create a new point layer with the pipe information added to the attribute table (the pipeID). You have to be aware that the point will be ''joined'' to the closest pipe, so if the one point is close from two pipes, it could be joined to the wrong one.
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01-30-2012
03:18 AM
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Normally this situation happens when the ''event's route id'' is not found in the Route layer. Instead of dropping the unreferenced events, it keeps it but with a geometry equal to 'null'. You could first verify for one of these events that failed, what is the RouteID written. Then look in your Route Layer if you can really find this route ID.
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01-27-2012
03:22 AM
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Have you already tried to use the ''Spatial Join''? (right-click on your layer, then join ''Join''. Instead of ''Join by attribute'', chose ''Spatial Join'') This could allow you to add fields to your point layer, saying in which polygon they are contained. You could do it on the point layer in order to obtain a new point layer containing the polygon's attributes in which the point is contained. If you only need a count by polygon (how many points are contained inside a polygon), you could ''summarize'' (right-click on the layer, then Summarize) your data on the Polygon ID. Or you could install the 'Hawth's Analysis Tools for ArcGIS' and use the function 'COUNT POINTS IN POLYGONS TOOL'. If you need to count a specie only once by polygon, you would need to do something equivalent to a sql ''group by'' on your point layer. You could instead try to ''dissolve'' (toolbox) your point layer based on on polygon ID and speciesID. It could remove (not sure) the duplicate species in a polygon (select the multiparts option). Then you could 'Summarize''.
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01-27-2012
03:00 AM
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Maybe it finds no field from the same type as your other field (in the geo-layer). You could verify what is the field type in your geo-layer, then verify if it is the same in your summarized field. If no, you could create a new field of this type and copy the values inside with the Calculate Field option.
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01-26-2012
08:39 AM
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I think you could do this: 1) load your Excel file in ArcMap 2) right-click on the table-layer in the 'Table of content' (TOC) 3) chose the option ''Summarize'', then summarize base on the ZIP code field. This will return a new dbf file with frequencies of each ZIP code. (maybe you will need to transform the Excel file in DBF in order to summarize..I don't remember.. 4) you could then join (by attributes) this dbf file with you geo-data based on the ZIP code 5) Symbolized your ZIP code layer based on the frequencies (count field from the Summarized data) - by ceating class renderer I could not verify the details here, because I don't have ArcMap presently...
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01-26-2012
06:03 AM
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