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calvinmetcalf / shapefile-js

Convert a Shapefile to GeoJSON. Not many caveats.
http://calvinmetcalf.github.io/shapefile-js/
MIT License
735 stars 230 forks source link

Expose Proj4 #115

Closed MadMartinR closed 5 years ago

MadMartinR commented 5 years ago

Is it possible to access the shapefile-js Proj4 library directly? I have a need to re-project coordinates within my JavaScript and do not want to have to load the library twice (ie once within shapefile-js and also directly as a script)

calvinmetcalf commented 5 years ago

https://github.com/proj4js/proj4js

MadMartinR commented 5 years ago

I guess my question wasn't very clear - I want to be able to use shapefile-js AND proj4 without the need to load Proj4 twice. In other words I would like to load shapefile-js and access the Proj4 library that is within shapefile-js. For example it would be useful to be able to access shp.proj4(....)

calvinmetcalf commented 5 years ago

it depends on how you are loading this library, if you are using browserify or webpack then you should be able to just require/import it like any other library and as long as you request the same version it will be deduped

MadMartinR commented 5 years ago

Calvin, thanks for the quick response. I am just loading the shp.min.js file directly within the web page in conjunction with leaflet.js and a few other libraries. I was hoping there was a simple proj4 object within the shapefile-js that I could call. I will look at using browserify or webpack and see if I can sort it that way.

MadMartinR commented 5 years ago

Solved: In case anyone finds this post I followed Calvin's advice and used browserify to re-browserify the shp.js file after adding shp.proj4 = proj4 to the second to last line of the index.js file.

This means I can now include shp.js in my web page and access proj4 in my javascript code using shp.proj4