Set the output location and name ('IntersectA' for this example). Set the input to the polygon shapefile and the BufferA (result from the buffer) shapefile. Open the Intersect (Analysis) geoprocessing tool from ArcToolbox, Analysis Tools > Overlay > Intersect.Set the linear unit, and note it for a later step. Set the Coordinate system to a Projected Coordinate System. In the polygon shapefile attribute table, right-click the field TotArea > Calculate Geometry.Name the field 'TotArea', set the type to Double. In the ArcMap Table of Contents, right-click the polygon shapefile > Open Attribute table.In the Select a Coordinate System dialog box, select Predefined > Projected Coordinate Systems > Continental > North America > USA Contiguous Albers Equal Area Conic. In ArcMap, click View > Data Frame Properties > Coordinate System tab. If the data is in a projected coordinate system, skip to the next step.Name the output (BufferA in this example). Set the Input Features to the point shapefile. Open the Buffer (Analysis) geoprocessing tool from ArcToolbox, Analysis Tools > Proximity > Buffer.Add the point and polygon shapefiles or feature classes to ArcMap. If it is Object ID (OID), create a new field to calculate the OID values within, as the OID can change with these processes. It is required that each point and polygon feature is given a unique identifier. The entire process can be created inside of a model. This procedure assumes that attribute data is spread evenly across a polygon feature. The one-mile buffer around the point crosses 30% of a polygon with a population of 100, and 40% of a second polygon with a population of 10 therefore, the total population within the 1 mile buffer is 34: The current data is a census polygon feature class containing population values for each polygon feature. In most cases, the buffer does not encompass whole polygons, the procedure allows for calculating the percentage of a polygon the buffer encompasses, and then dividing the data by that percentage.Įxample: The total population within one mile of a point is desired. Instructions provided describe how to create a buffer around a point feature and use it to extract attributes from an overlapping polygon feature class. The expected structure of the content.How To: Create a buffer around a point feature and use it to extract attributes from an overlapping polygon feature class Summary Is simply an array of bytes viewed through a specific mask. JavaScript world, sometimes they are misinterpreted or misused. However, because they recently landed in the See EasierĪrrayBuffer String conversion with the EncodingĪrrayBuffers are used to transport raw data and several new APIs rely on them, Recommended approach is to use the official API wherever possible. Still applies for browsers that don’t yet support the Encoding API, but the Number of browsers now support it natively.
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