topic Re: create line graphic in WAB in Web AppBuilder Custom Widgets Questions

create line graphic in WAB

TerryGustafson — Wed, 26 Aug 2015 15:54:13 GMT

I'm wondering if anyone has generated a simpleLine Symbol in WAB. I'm wanting to pass a start and end location offset and return a line symbol from the entered values. does anyone know of an example out there to look at?

TIA

Re: create line graphic in WAB

RobertScheitlin__GISP — Wed, 26 Aug 2015 16:04:16 GMT

Terry,

Use some simple code like this:

var polyline = new Polyline(this.map.spatialReference);

polyline.addPath([new Point(10,10), new Point(20,20), new Point(30,30)]);

var lineGra = new Graphic(polyline, new SimpleLineSymbol());

Re: create line graphic in WAB

TerryGustafson — Wed, 26 Aug 2015 18:40:20 GMT

Robert, Sorry once again I was as clear as mud.. I could have put a little more detail into what I'm trying to accomplish. I have a GP service that creates a route event layer. It has a corridor name and from and to offset fields. The user will enter the coordinate and mile post offset and I want it to return a simpleLine graphic. Here is what I have so far. Robert, Sorry once again I was as clear as mud.. I could have put a little more detail into what I'm trying to accomplish. I have a GP service that creates a route event layer. It has a corridor name and from and to offset fields. The user will enter the coordinate and mile post offset and I want it to return a simpleLine graphic. Here is what I have so far.

Re: create line graphic in WAB

RobertScheitlin__GISP — Wed, 26 Aug 2015 19:10:29 GMT

Terry,

Wow there is nothing that is close to working in the widget code you provided. Based on the GP service you are calling only having one parameter that is an input, I have no idea how you are expecting to draw a line on the map based on values like 10.5 and 15.9.

Re: create line graphic in WAB

TerryGustafson — Wed, 26 Aug 2015 19:58:58 GMT

I know there is nothing close to working I was just showing the code I had... I was wondering if I could use the from_offset and to_offset fields from that parameter to generate my line. I was thinking of using the measured shape from the gp service to return the corridor name and then the linear offset..

Re: create line graphic in WAB

RobertScheitlin__GISP — Wed, 26 Aug 2015 20:15:17 GMT

Terry,

You are going to have to explain your workflow a lot better then. Normally I would look at someones code and be able to determine a basic or suggested workflow but there is nothing in your code or the params of your GP that give me a clue on how you expect to be able and draw a line on the map.

Re: create line graphic in WAB

TerryGustafson — Wed, 26 Aug 2015 20:53:58 GMT

I'm sorry, my original post was not very clear.. Obviously my second was even worse. I guess I was hoping to see some sample code that took a "from offset" and "to offset" and created a route between those two points and plotted a graphic line of that on the map. I looked at some of the live apps that are out there and there was not really anything like it.. I guess the closest thing was the directions widget.

Re: create line graphic in WAB

RobertScheitlin__GISP — Wed, 26 Aug 2015 21:11:03 GMT

Terry,

So are the "from offset" and "to offset" suppose to be actual points on the map or values like in your html place holder (i.e. 10.5). If they are just suppose to be numbers like 10.5 this is where you really lose me because 10.5 is not an X and Y so where would you place this singular number on the map? Now if the "from offset" and "to offset" and the "corridor name" goes to the GP and the GP returns a feature that has some geometry than that is a different matter.

Re: create line graphic in WAB

TerryGustafson — Wed, 26 Aug 2015 22:24:55 GMT

Yes you are correct in the later. The users will enter the corridor and an offset of 10.5 to 15.9 for example then the GP would be hit and the GP returns a feature that has some geometry like a graphic line feature. I did not know if only having the from_offset and to_offset fields would work or if they needed to be a parameter in the GP service. Thanks for being so patient with my ignorance.

Re: create line graphic in WAB

ModyBuchbinder — Thu, 27 Aug 2015 05:22:14 GMT

I think the best way is to use geoprocessing service.

Just build a simple python program that does the operation. The parameters will be the from, to and offset. The tool will create line feature class.

Then you publish and use it in WAB, it will return you thecreated feature class and a new layer.

Have Fun

Mody

Re: create line graphic in WAB

TerryGustafson — Thu, 27 Aug 2015 19:57:20 GMT

I think I have the GP service correct now.. can you see it?

https://app.mdt.mt.gov/arcgis/rest/services/LRS/ReturnRouteSegment/GPServer/ReturnRouteSegment

Re: create line graphic in WAB

RobertScheitlin__GISP — Fri, 28 Aug 2015 13:50:13 GMT

Terry,

So the parameters look fine now that you have an output of a feature. Have you tested this GP just using the url or from ArcMap?

Re: create line graphic in WAB

TerryGustafson — Fri, 28 Aug 2015 14:05:37 GMT

I connected to the server via arc catalog but not sure how to test it as I have not given it any input parameters.. Not sure if that makes sense..

Re: create line graphic in WAB

TerryGustafson — Fri, 28 Aug 2015 14:17:37 GMT

I’m sorry I spoke to soon, it is returning the values correctly… Now I need to pass the values to the GP service. The GP service will process will select the corridor the from_point and the to_point and plot the line as a graphic…

Sounds easy enough for someone who is smart.. ☺

Re: create line graphic in WAB

RobertScheitlin__GISP — Fri, 28 Aug 2015 14:24:19 GMT

Terry,

I am not sure what you are suppose to be passing as the input... You now have the input as a recordset with fields for Corridor, from_offset, to_offset. so when you say you tested it and it worked what did you supply as the input?

Re: create line graphic in WAB

TerryGustafson — Fri, 28 Aug 2015 15:24:49 GMT

Here are screen shots of the input and the return segment. I entered the corridor route C000001E and then the to and from offsets and it returns the line to the map.

Re: create line graphic in WAB

RobertScheitlin__GISP — Sun, 12 Dec 2021 08:49:37 GMT

Terry,

There is something not setup correctly on your GP service because I can get no actual geometry results back from the GP when submitting the same inputs you are using in ArcMap.

Input:

{
 "paramName": "Route_Points",
 "dataType": "GPRecordSet",
 "value": {
  "displayFieldName": "",
  "fields": [
  {
  "name": "OBJECTID",
  "type": "esriFieldTypeOID",
  "alias": "OBJECTID"
  },
  {
  "name": "Corridor",
  "type": "esriFieldTypeString",
  "alias": "Corridor",
  "length": 50
  },
  {
  "name": "from_offset",
  "type": "esriFieldTypeInteger",
  "alias": "from_offset"
  },
  {
  "name": "to_offset",
  "type": "esriFieldTypeInteger",
  "alias": "to_offset"
  }
  ],
  "features": [{
  "OBJECTID": 1,
  "Corridor": "C000001E",
  "from_offset": "100.59",
  "to_offset": "256.236"
  }],
  "exceededTransferLimit": false
 }
}

Output results:

{
 "paramName": "Route_Points_Events",
 "dataType": "GPFeatureRecordSetLayer",
 "value": {
  "displayFieldName": "",
  "geometryType": "esriGeometryPolyline",
  "spatialReference": {
  "wkid": 32100,
  "latestWkid": 32100
  },
  "fields": [
  {
  "name": "OBJECTID",
  "type": "esriFieldTypeOID",
  "alias": "OBJECTID"
  },
  {
  "name": "Corridor",
  "type": "esriFieldTypeString",
  "alias": "Corridor",
  "length": 50
  },
  {
  "name": "from_offset",
  "type": "esriFieldTypeInteger",
  "alias": "from_offset"
  },
  {
  "name": "to_offset",
  "type": "esriFieldTypeInteger",
  "alias": "to_offset"
  },
  {
  "name": "Shape_Length",
  "type": "esriFieldTypeDouble",
  "alias": "Shape_Length"
  }
  ],
  "features": [{
  "attributes": {
  "OBJECTID": 1,
  "Corridor": null,
  "from_offset": null,
  "to_offset": null,
  "Shape_Length": 0
  },
  "geometry": {"paths": []}
  }],
  "exceededTransferLimit": false
 }
}

Just because a GP working in ArcMap does not mean that you have it setup properly to work with ArcGIS Server as a service. You may need to read up on using a scratchGDB when publishing GP Services.

Re: create line graphic in WAB

TerryGustafson — Mon, 31 Aug 2015 02:29:46 GMT

ok, thanks for letting me know, I assumed it was working correctly if it was working in ArcMap. I will look into the scratchGDB.. Thank you

Re: create line graphic in WAB

TerryGustafson — Mon, 31 Aug 2015 13:33:23 GMT

Sorry to bug you this early but I saw the inputs and the outputs you had posted. How did you run those so that it returned the null values?

Re: create line graphic in WAB

RobertScheitlin__GISP — Mon, 31 Aug 2015 13:53:14 GMT

Terry,

You can test your GP Service just by going to the service url in you browser and clicking the submit job link at the bottom of the page.