ArcGIS Online Alternative

• geonode

  6 1,384 9.8 JavaScript

  GeoNode is an open source platform that facilitates the creation, sharing, and collaborative use of geospatial data.

  

I would reconsider your approach just extend Geonode https://geonode.org/ +MapStore https://www.geosolutionsgroup.com/technologies/mapstore/ and add additional mapping apps and features to that robust proven solution. look at zoo-project http://www.zoo-project.org/ for OGC API PROCESSES (WPS) and expose to map clients ability to do analysis and conversion and geoprocessing hitting this nice API. Utilize power of postgis and expose that to mapping clients so contains or within and nearest and distance and bearing and buffer etc

• SurveyJS

  surveyjs.io sponsored

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

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