topic Re: Is it possible to only Identify on layers that I have in an array in ArcGIS JavaScript Maps SDK Questions

Is it possible to only Identify on layers that I have in an array

LuciHawkins — Tue, 28 May 2013 19:36:35 GMT

Hi,

I have been using the Identify tool with idParams.layerOption = esri.tasks.IdentifyParameters.LAYER_OPTION_VISIBLE;

Well, I do not want some of those "visible" layers identified when a user clicks. Is it possible to use an array of layer names that I already have built so that only those are displayed in the popup?

Thanks,

Luci

Re: Is it possible to only Identify on layers that I have in an array

KenBuja — Tue, 28 May 2013 20:23:21 GMT

IdentifyParameters has the property layerIds, where you can set the layers that the are used in the task.

Re: Is it possible to only Identify on layers that I have in an array

VinayBansal — Wed, 29 May 2013 02:51:52 GMT

This sample may help you....
http://help.arcgis.com/en/webapi/javascript/arcgis/jssamples/find_drilldown.html

Re: Is it possible to only Identify on layers that I have in an array

LuciHawkins — Wed, 29 May 2013 13:30:48 GMT

I saw those and they would work if my layers were all in 1 map service. I have over 10 different map services that I need to provide popup information for. The problem is my identify tool returns a popup for map services that I do not want to show information for. For example, I do not want popups for my city limits, hydrography, roadways, etc. but since they are visible they are selected when I use LAYER_OPTION_VISIBLE. I want to filter the results from LAYER_OPTION_VISIBLE against an array I have of layer names. Only those that are in my array should show up in a popup if they are visible.

I am a noob and hack at best so any help would be greatly appreciated 🙂

Thanks,

Luci

Re: Is it possible to only Identify on layers that I have in an array

KenBuja — Sat, 11 Dec 2021 18:58:39 GMT

In your loop where your executing each task, why not set the layerIds parameter of idParams for each of the tasks? You could use another array (visibleLayers) where you have stored the visible layers for each layer

        for ( i = 0; i < tasks.length; i++) {//Use 'for' instead of 'for...in' so you can sync tasks with defTasks
            try {
                idParams.layerIds = visibleLayers;
                tasks.execute(idParams, defTasks.callback, defTasks.errback);
                //Execute each task
            } catch (e) {
                console.log("Error caught");
                console.log(e);
                defTasks.errback(e);
                //If you get an error for any task, execute the errback
            }
        }

Re: Is it possible to only Identify on layers that I have in an array

LuciHawkins — Thu, 30 May 2013 13:13:30 GMT

Hey,

I have an array built (identLayers) with the layerNames of all of the layers from the 10 or more map services that I want people to be able to query popup information for. I need to be able to take the results of the map click and only produce the popup for the layers that are visible AND whose layerName appears in the array. I tried plugging it into the statement that you added below and it did not work.

for ( i = 0; i < tasks.length; i++) {//Use 'for' instead of 'for...in' so you can sync tasks with defTasks
try {
idParams.layerIds = identLayers;
tasks.execute(idParams, defTasks.callback, defTasks.errback);
//Execute each task
} catch (e) {
console.log("Error caught");
console.log(e);
defTasks.errback(e);
//If you get an error for any task, execute the errback
}
}

This is part of my array code:

function addIdentMaps() {
//push layers to identify array
identLayers.push({
layerName : 'DEEDS'
});
identLayers.push({
layerName : 'Parcels'
});
identLayers.push({
layerName : 'ORDINANCES'
});
identLayers.push({
layerName : 'RESOLUTIONS'
});
identLayers.push({
layerName : 'EASEMENT_Disclaimer'
});

Thanks! Luci

Re: Is it possible to only Identify on layers that I have in an array

KenBuja — Thu, 30 May 2013 14:09:39 GMT

The layerIds property is expecting a array of numbers, like

idParams.layerIds = [0,1,5,9];

Instead of using identLayers, you'll have to build an array that holds the layers you want to show in your popup for each map service.

Re: Is it possible to only Identify on layers that I have in an array

LuciHawkins — Thu, 30 May 2013 14:28:30 GMT

I was using layerName because I couldnt figure out how to distinguish between layer DEEDS which is 0 in mapservice1 and layer Parcels which is 0 is mapservice2? My array using just the layerIds would look like: [0,1,0,1,0,2,0,1,2,3,4,0,1,2,3,4,5];

Thanks! Luci

Re: Is it possible to only Identify on layers that I have in an array

KenBuja — Sat, 11 Dec 2021 18:58:42 GMT

Remember, though, that you're executing an IdentifyTask for each individual map service. If you simply wanted to get the visible layers for each service, you could use this

var visLayers = dojo.map(layers, function (layer) {
    return layer.visibleLayers;
});

but that would give you more layers than you want, I suspect. Instead, you'd cycle through each service and add the visible layers for that specific service, so you'd have something like

visibleLayers = {[0,1],[0,1],[0,2],[0,1,2,3,4],[0,1,2,3,4,5]}

These would have to be in the same order as the tasks, so you could use the line

idParams.layerIds = visibleLayers;

Re: Is it possible to only Identify on layers that I have in an array

MichaelVolz — Wed, 27 Jan 2016 17:58:42 GMT

Is it possible for you to put all the data in your 10 mapservices into 1 mapservice?