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I am looking for a function to read/write points, lines and polygons from ESRI's shapefile format (as used in Arcview) for use in Matlab
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Read the shapefile by using the shaperead function. Indicate that the shapefile uses latitude and longitude coordinates using the 'UseGeoCoords' name-value pair. Note that the shaperead function returns a geographic data structure with latitude and longitude fields (a geostruct ).
A shapefile is an Esri vector data storage format for storing the location, shape, and attributes of geographic features. It is stored as a set of related files and contains one feature class.
If the file is in your current folder or in a folder on the MATLAB® path, then specify the name of the file, such as "myFile. shp" . If the file is not in the current folder or in a folder on the MATLAB path, then specify the full or relative path name, such as "C:\myfolder\myFile. gpx" or "dataDir\myFile.
From the Matlab mapping toolbox, use the shaperead function
For example download the NOAA Interstate Highway shape file here, extract and then read data into Matlab using the function, S = shaperead('in101503.shp');
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If you do not have the Matlab mapping toobox, the very useful m_map package now has an m_shaperead() function which does a good job of reading shapefiles.
X = m_shaperead('filename'); % for filename.(dbf,shp,...)
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