ako
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Cropping Shapefiles in QGIS?
Accepted answer
35 votes

You say you have a shapefile with appropriate regions, so you can use that for cutting. In the parlance of QGIS, it sounds like you are after Vector->Geoprocessing Tools -> Clip. If you need to ...

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Help using the US American Community Survey Data
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10 votes

You want to assemble a nationwide set in one file? For how many variables? There are a few hoops to get over to actually connect the STFIDs in your shapefile with the data. I couldn't read if your ...

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Total of attribute field of point layer per polygon layer
8 votes

If getting PostGIS set up right now is more than you want to get involved with, you can get by with probably much less effort in the program you have chosen. You will want to assign to each of your ...

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Determining area of county land mass without water features using ArcGIS Desktop?
6 votes

In an arcmap solution, I would first move all features to a geodabase. This would automatically add geographic fields such as length, area of features. I assume that the waterways are a polygon ...

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How is margin of error reported on a map?
5 votes

I have seen it done on a choropleth with the coloring showing the estimate, and a dotted/hashed overlay representing coefficients of variation. But I have not seen a standard for this.

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Selecting top 5 most expensive items in personal geodatabase
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4 votes

You can do something like this in the query builder--it looks much like what you already have--this is tried on a personal geodabase "backend"--each has its own sql flavor so the file geodabase may be ...

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Importing x y coordinates from spreadsheet in ArcGIS
4 votes

Assuming the numbers are read as actual numbers and not strings and the csv file is not open in excel (arcmap seems to protest if files are open elsewhere), have you tried selecting a specific ...

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Printing to PDF with Vector shapefiles, text, etc using ArcPy?
3 votes

This may or may not have anything to do with arcpy. In the ArcMap 9 series, when exporting maps which included raster layers or even bitmap patterns, vectors would be rasterized as well. If you are ...

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Computing distance of a georeferenced .jpg to each polygon (town) in a shapefile
2 votes

As @Fezter indicates, it may be worth it to seek separate sources of data. It should be fairly straightforward given how general the data is. Have a look at either OSM or US Census' TIGER files. Once ...

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Finding polygons within polygon using ArcGIS Desktop?
2 votes

If you have many lake features and island features to match, you may want to perform a spatial join with the target layer being the islands. By spatially joining, you are assigning attributes from a ...

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Zip code highlighting in Google Maps?
Accepted answer
1 votes

I am not entirely sure if you are asking about implementation hints (I can't help you there) or more specifically about the zip code boundaries. In any case, the Census Bureau provides so-called zip ...

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Can I Combine Areas in Quantum GIS?
1 votes

This is an aggregation called dissolve. You can do it in QGIS with the ftools plugin. Go to Plugins->Fetch Python Plugins and search for ftools. EDIT: The ftools plugin ship with QGIS; it just needs ...

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Analyse spatial data and extract results in tabular form in QGIS
1 votes

Assuming both layers are vector layers (as opposed to raster, which pixelates when zoomed close), I would do an intersect between the two, found under Vector->Geoprocessing Tools. This creates a ...

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Concatenating Fields in ArcMap dynamically?
1 votes

Forgive me, but why is it an advantage to have the field concatenated at all, rather than separate? Seems like if it, for example, is for labeling purposes for a large scale parcel map, you can have ...

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