topic Re: need example code of nodeJS project querying enterprise hosted feature layer service, using ArcGIS REST API in ArcGIS JavaScript Maps SDK Questions

need example code of nodeJS project querying enterprise hosted feature layer service, using ArcGIS REST API

MichaelLev — Thu, 26 May 2022 09:01:26 GMT

I need to develop web service in our enterprise server,
which will be addressed by its url endpoint, with x,y query parameters,
and it will query a hosted feature layer service to get some table attributes
of the polygon that intersects the x,y point.

I need some basic code example
of a nodeJS project
querying an enterprise hosted feature layer service, using ArcGIS REST API

Re: need example code of nodeJS project querying enterprise hosted feature layer service, using ArcGIS REST API

BlakeTerhune — Thu, 26 May 2022 14:36:16 GMT

Esri has quite a few sample apps showcasing various parts of the ArcGIS API for Javascript. You don't need NodeJS natively so none of the samples use it. You might be interested in Basic Querying in FeatureLayer. You'll want to use the "intersects" spatialRelationship property when you query. Here's an example of getting URL parameters to query a feature layer.

Re: need example code of nodeJS project querying enterprise hosted feature layer service, using ArcGIS REST API

AndyGup — Thu, 26 May 2022 14:42:00 GMT

Hi @MichaelLev for node projects also take a look at ArcGIS REST JS => https://developers.arcgis.com/arcgis-rest-js/layers/query-a-feature-layer-sql/ and here's the API reference: https://developers.arcgis.com/arcgis-rest-js/api-reference/arcgis-rest-feature-service/queryFeatures.

Re: need example code of nodeJS project querying enterprise hosted feature layer service, using ArcGIS REST API

MichaelLev — Sun, 29 May 2022 15:08:15 GMT

Thanks, @BlakeTerhune and especially @AndyGup for referring my question.

Indeed I am using nodeJS for developing the non-interactive web service (I prefer it upon Python)
and queryFeatures example was enlighting since this is the way I go.

REQUEST: I need also do "fetchImage" upon MapImageLayer and it will help me bery much to know what is the specific ArcGIS Rest API that I need for this. Does someone know?

2nd REQUEST: Is there some short example of whole little node program addressing the enterprise portal server?