Creation of projection metadata file (*.prj) for shapefiles

Question

Melanie VT 2023-2-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1920115-creation-of-projection-metadata-file-prj-for-shapefiles

评论： Melanie VT 2023-7-6

Dear All,

The in-built shapewrite function creates three output files: [basename '.shp'], [basename '.shx'], and [basename '.dbf']. There is no option to export the projection metadata (.prj) file, whose absence causes a crucial problem while using the shapefile in the GIS software environment. Is there any workaround to create a projection metadata (.prj) file in MATLAB?

Cheers,

Mel

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PADMAKAR 2023-6-6

Facing the same issue. I dont seen any workaround..

Melanie VT 2023-6-30

I could also find nothing in other forums @PADMAKAR. I thought it might be added in the R2023a, but unfortunately, it didn't. Fingers crossed for future versions😊

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Answer 1

Kojiro Saito 2023-7-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1920115-creation-of-projection-metadata-file-prj-for-shapefiles#answer_1268338

在 MATLAB Online 中打开

As of R2023a, shapewrite does not create .prj file, so you need to create it with wktstring and writematrix.

Here is a sample.

shp = shaperead('boston_placenames.shp');
shpInf = shapeinfo('boston_placenames.shp');
% Create .shp, .shx and .dbf files
shapewrite(shp, 'out.shp') 
% Create Well-known text string
wkt = wktstring(shpInf.CoordinateReferenceSystem);
% Create .prj file
writematrix(wkt,'out.prj','FileType','text', 'QuoteStrings', false)