[GIS] Serving features of mixed transparency levels from ArcGIS Server map service

arcgis-servermap-service

I'm using a dynamic map service layer that is shown in a semi transparent way overlaid on a tiled map service.

There are a few polygon layers in the dynamic map service layer that cover the whole mapped area in different solid colors. Those layers are set as transparent in the MXD, but when the map is served out from ArcGIS server, it displays differently from in ArcMap. The layers blend down with the background MXD itself, making them turn %50 white, and making the basemap behind them as difficult to read as if they were solid.

Is there a way to serve features of mixed transparency levels from an arcgis server service?

Best Answer

Is there a way to serve features of mixed transparency levels from an arcgis server service?

Yes. Please read this whitepaper from Esri:
Work with transparencies in an ArcGIS Server Web mapping application

From your description, I believe you should:

Analyze the map using Map Service Publishing tools.
Convert layer transparency to color transparency.
Publish to ArcGIS server as a MSD.

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I went to ESRI support for this one, and the person who called me back (I wish I'd written down his name) was unusually helpful.

The answer strikes me as a bit strange. The instructions say

ESRI Data & Maps for ArcGIS Server contains map documents that you will publish on your GIS server as services. These are located in the source_documents folder of ESRI Data & Maps for ArcGIS Server. You need to copy all of the map documents that you intend on publishing to a shared location on your network. Your GIS server's SOC account should have Read permissions to this shared location.

I took this to mean the folder must be accessible to the server with read permissions for the ArcGISSOC user. But because we have one GIS server per environment, I just copied the map documents and data folders to a folder on the server. Turns out you still have to explicitly share that folder with Read access for the ArcGISSOC user even if it is on the same disk as the rest of the data.

So my assumption was wrong and I should have read the instructions literally, no matter how strange it seems. Unfortunately, using a share on a server is not allowed on our network so these data sets are useless to us. But I thought someone might need to know someday.

[GIS] How to Enabling the option to convert layer transparency to color transparency for ArcGIS Server

You already fixed the problem as I see by the fact that the warning says it is "resolved". The way to do this is to right-click the warning and you are given the option to resolve the conflict right there.

You do NOT want to try to adjust this in the mxd project file (leave the transparency value that you have set for the layer). When you save the service, the description of the service will show transparency:0 for the layer but you will be able to see through it to the layers below.

Edit: If you did try to modify the transparency, you should go back and set it the way you had it.

I had a similar problem and I fixed it by opening the mxd project that I used to create the service, setting transparency on the layer by right-clicking it in the Table of Contents and setting Transparency to 50% or so on the Display Tabl. Then I shared the service. When using the layer in my javascript map. I also had to set opacity on the layer so perhaps that may help.

var myLayer = new ArcGISDynamicMapServiceLayer("xxx.xxxxxxxx.org:6080/arcgis/rest/services/LAYER/F‌older/…;, {"imageParameters": imageParameters, opacity: 0.45, format: "png32"}); imageParameters.format = "png32"; map.addLayer(myLayer);

My Transparency Issue

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