topic Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1 in ArcGIS API for Flex Questions

Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

RobertoFigueroa — Fri, 08 Oct 2010 15:25:53 GMT

Hi,
I am trying in implement the simple info win widget to pop up some attribute from a layer.
However, when I set up this point layer/map service as a "feature" type, the points do not display. Whereas when set up as "dynamic" type all points are displayed. Please see below a section of my config.xml. Am I missing anything? Thanks Roberto

        <basemaps>
            <layer label="Base Map" type="tiled" visible="true" alpha="1"
                        url="http://devn19/ArcGIS/rest/services/CanadaMercator_2010/MapServer"/>
        </basemaps>

        <operationallayers>
            <layer label="CML Loans" type="dynamic" visible="true"
               url="http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/MapServer"/>

           <layer label="CML loans only" type="feature" visible="true" alpha="1"
                 info="widgets/InfoTemplates/SimpleInfoWinWidget.swf"
                 infoconfig="widgets/InfoTemplates/CML_loans.xml"
                    url="http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/FeatureServer/0"/>
        </operationallayers>

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

DasaPaddock — Mon, 11 Oct 2010 19:44:13 GMT

Have you tried using this url instead?
http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/MapServer/0

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

RobertoFigueroa — Tue, 12 Oct 2010 16:50:26 GMT

Have you tried using this url instead?
http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/MapServer/0

I have tried MapServer instead of FeatureServer but still the layer does not display.

Is it necessary to have the layer published as a feature service, as opposed to a map service, in order to read that layer as "feature" type in the config.xml file? We are currently in ArcGIS Server 9.2, not 10.0, so we cannot publish a feature service.

Thanks

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

DasaPaddock — Tue, 12 Oct 2010 16:54:22 GMT

A map service is fine. You only need a feature service if you need to edit the layer.

Is "Query" listed as a supported operation at the bottom of the page at:
http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/MapServer/0

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

RobertoFigueroa — Tue, 12 Oct 2010 17:38:54 GMT

A map service is fine. You only need a feature service if you need to edit the layer.

Is "Query" listed as a supported operation at the bottom of the page at:
http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/MapServer/0

yes, it says "Supported Operations: Query Layer"

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

DasaPaddock — Tue, 12 Oct 2010 17:43:58 GMT

Does the layer have a min or max scale value?

If you use a tool like HttpFox, do you see a /query request being sent to the layer?

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

RobertoFigueroa — Tue, 12 Oct 2010 19:17:55 GMT

Does the layer have a min or max scale value?

If you use a tool like HttpFox, do you see a /query request being sent to the layer?

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

RobertoFigueroa — Tue, 12 Oct 2010 19:36:10 GMT

when I open this URL associated with the GET request

http://devn19/ArcGIS/rest/services/CML_loans_only/FeatureServer/0?f=json

I get the following error:

{"error":{"code":500,"message":"Server Error - Object reference not set to an instance of an object.","details":[]}}

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

DasaPaddock — Tue, 12 Oct 2010 19:50:28 GMT

I'm confused now. I thought you were trying to load this layer:
http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/FeatureServer/0
but you don't have 10, so you were going to try:
http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/MapServer/0

Is this correct? Also, can you try clicking the "Query Layer" link and see what happens when you query the layer using the html form with a where clause of something like 1=1?

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

RobertoFigueroa — Tue, 12 Oct 2010 20:19:42 GMT

Sorry ...I am using a new map service (CML_loans_only) with only one layer in the MXD now. Just trying to see if that would make a difference in the viewer.
Also, I hadn't cleared the cache in ArcGIS REST services and therefore was still requesting a .....FeatureServer/0 as opposed to MapServer/0, even though the config.xml had been changed to MapServer/0. Now after clearing the REST services cache, the viewer is loading:

http://devn19/ArcGIS/rest/services/CML_loans_only/MapServer/0?f=json but still no points are displayed in the viewer.

When you query under http://devn19/ArcGIS/rest/services/CML_loans_only/MapServer/0/query and try where 1=1, the query layer operation does return results

My map tag section in the config.xml is now:

<map initialextent="-16000000 6000000 -6000000 10000000" top="40">

    <basemaps>
      <layer label="CMHC Base Map" type="tiled" visible="true" alpha="1"
      url="http://devn19/ArcGIS/rest/services/CanadaMercator_2010/MapServer" />
    </basemaps>

    <operationallayers>
      <layer label="Homeowner Loans" type="dynamic" visible="true"
       url="http://devn19/ArcGIS/rest/services/emili_ho_loans_dev/MapServer" />

       <layer label="CML loans" type="feature" visible="true" alpha="1"
       info="widgets/InfoTemplates/SimpleInfoWinWidget.swf"
       infoconfig="widgets/InfoTemplates/CML_loans.xml"
       url="http://devn19/ArcGIS/rest/services/CML_loans_only/MapServer/0"/>

    </operationallayers>
</map>

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

DasaPaddock — Tue, 12 Oct 2010 20:36:32 GMT

Does HttpFox show a query request to http://devn19/ArcGIS/rest/services/CML_loans_only/MapServer/0/query ?
If yes, what is the response?

Note: Once this is working, another issue is going to be the symbology. If you're not using ArcGIS Server 10, the feature layer doesn't get the symbology from the server so you'll see default gray symbols. You'll need to update the code to set a renderer on the feature layer.

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

RobertoFigueroa — Wed, 13 Oct 2010 12:55:45 GMT

Yes, it does. here is the request line:

GET /ArcGIS/rest/services/CML_loans_only/MapServer/0/query?returnGeometry=true&outSR=%7B%22wkt%22%3A%22PROJCS%5B%5C%22World%5FMercator%5C%22%2CGEOGCS%5B%5C%22GCS%5FNorth%5FAmerican%5F1983%5C%22%2CDATUM%5B%5C%22D%5FNorth%5FAmerican%5F1983%5C%22%2CSPHEROID%5B%5C%22GRS%5F1980%5C%22%2C6378137%2E0%2C298%2E257222101%5D%5D%2CPRIMEM%5B%5C%22Greenwich%5C%22%2C0%2E0%5D%2CUNIT%5B%5C%22Degree%5C%22%2C0%2E0174532925199433%5D%5D%2CPROJECTION%5B%5C%22Mercator%5C%22%5D%2CPARAMETER%5B%5C%22False%5FEasting%5C%22%2C0%2E0%5D%2CPARAMETER%5B%5C%22False%5FNorthing%5C%22%2C0%2E0%5D%2CPARAMETER%5B%5C%22Central%5FMeridian%5C%22%2C0%2E0%5D%2CPARAMETER%5B%5C%22Standard%5FParallel%5F1%5C%22%2C0%2E0%5D%2CUNIT%5B%5C%22Meter%5C%22%2C1%2E0%5D%5D%22%7D&geometry=%7B%22xmin%22%3A%2D8434059%2E615335569%2C%22ymin%22%3A5647089%2E735683931%2C%22xmax%22%3A%2D8410822%2E713464431%2C%22ymax%22%3A5661402%2E59711607%7D&spatialRel=esriSpatialRelIntersects&geometryType=esriGeometryEnvelope&outFields=%2A&inSR=%7B%22wkt%22%3A%22PROJCS%5B%5C%22World%5FMercator%5C%22%2CGEOGCS%5B%5C%22GCS%5FNorth%5FAmerican%5F1983%5C%22%2CDATUM%5B%5C%22D%5FNorth%5FAmerican%5F1983%5C%22%2CSPHEROID%5B%5C%22GRS%5F1980%5C%22%2C6378137%2E0%2C298%2E257222101%5D%5D%2CPRIMEM%5B%5C%22Greenwich%5C%22%2C0%2E0%5D%2CUNIT%5B%5C%22Degree%5C%22%2C0%2E0174532925199433%5D%5D%2CPROJECTION%5B%5C%22Mercator%5C%22%5D%2CPARAMETER%5B%5C%22False%5FEasting%5C%22%2C0%2E0%5D%2CPARAMETER%5B%5C%22False%5FNorthing%5C%22%2C0%2E0%5D%2CPARAMETER%5B%5C%22Central%5FMeridian%5C%22%2C0%2E0%5D%2CPARAMETER%5B%5C%22Standard%5FParallel%5F1%5C%22%2C0%2E0%5D%2CUNIT%5B%5C%22Meter%5C%22%2C1%2E0%5D%5D%22%7D&f=json HTTP/1.1

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

DasaPaddock — Wed, 13 Oct 2010 16:06:35 GMT

And the response?

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

AlexJones — Wed, 13 Oct 2010 21:07:33 GMT

I have had this issue as well using my 9.3.1 server. I am waiting for the install of our 10 server now as I assume this will solve the problem.
Dasa, is there anything special that needs to be in the map or feature class before a feature class is published to allow it to work as type feature? In my application I have very strange results. For example, I can use ....mapserver/11, but not ...mapserver/12. I can always get my point layer, but only one of my line layers works correctly. I was thinking that maybe on the 9.3.1 server I needed to set something up before hand. I have cleared cache, restarted, republished, tried our main server and our test server, many different map services and I cannot get consistent results. If I use the same layers in a query widget the query always works and If I make the layer type dynamic it will work as well(for display).

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

DasaPaddock — Wed, 13 Oct 2010 21:19:43 GMT

Dasa, is there anything special that needs to be in the map or feature class before a feature class is published to allow it to work as type feature?

I don't think so, but you may need to contact ESRI Tech Support for more help on this issue.

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

RobertoFigueroa — Thu, 14 Oct 2010 13:40:42 GMT

And the response?

I run the http line requesting that query for the layer (from HTTPFox) via the browser URL box and found out the response for that query request was in error! It was not recognizing the InSR and outSR. What happened was that even though both my Base Map and Feature Point Layer were in same projected coordinate systems (World Mercator), they had different geographic coordinates systems: base map in GCS83 and points in WGS84. Thus the viewer was requesting the points for the area of interest in GCS83 rather than WGS84.
With my base map published in WGS84 now, the points are displayed when read as a feature type. Great!!! Thanks Dasa!!
However, as Dasa pointed before, the issue now is about the symbology for those points. The symbols assigned in the MXD are not honored in the Flex Viewer. Is there any way to configure a specific render for this layer using the config.xml?

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

DavidTreat — Thu, 14 Oct 2010 22:02:10 GMT

I had this same problem with a polygon layer using Server 10, published as a Map Service. I originally had 4 scale dependent layers with different definition queries in each. I had success by changing to a single layer with no scale dependency. My URL specification ended in "MapServer/0."

Dave

Re: Layer does not display as a "feature" type in ArcGIS Flex viewer 2.1

MattAyer — Fri, 29 Oct 2010 12:37:06 GMT

I had the same issue. I projected the feature class to web Mercator and was than able to see the layer. Although in the map document I had the coordinate system set, it did not seem to display correctly when I used a layer as a feature "MapServer/0".