how to get base map ids from basemap gallery arcgis js (i.e. topo)

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01-27-2020 12:09 PM
CamCode
New Contributor III
Context: I am trying to simply create a 'Save Button' from selection of basemap in basemap gallery...

The only thing missing is I cannot find the 'well known string ids' from the basemaps in the basemap gallery for which I can use to reference later, i.e. streets, streets-vector, topo dark-gray, etc etc.

I am getting the objects responses with the below on any change of selection to the basemap gallery, I am seemingly getting EVERYTHING back but the 'well known string ids' in which I can save and use later to render that basemap. I am getting the title and property ID but the ids to change the map, i.e. topo are no where to be found within the object responses.

basemapGallery.watch('activeBasemap', function(newBasemap, property, object)        console.log('new active basemap', {newBasemap, property, object});.......... // also have tried pulling in the basemap obj here as well

i.e. I can programmatically, manually, change the basemap in my application or in the dev console with the below.

myapp.widgets.basemapManager.basemapGallery.activeBasemap = "streets"

The docs lead me to believe I can use portal item id to reference the basemaps but this did not work. I have tried to reference it every which way in accordance to the above line.

Below is a screenshot of my watch function after a selection has been made to the basemap gallery. No named string ids to change the map found, i.e. 'dark-grey' 'topo' 'streets' etc.

enter image description here

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RobertScheitlin__GISP
MVP Esteemed Contributor

Cam,

   There is no good way to get those well know ids. But you can use the portal item id.

basemapGallery.activeBasemap = {portalItem: {id: "588f0e0acc514c11bc7c898fed9fc651"}};

This sets the basemap to "topo".

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7 Replies
RobertScheitlin__GISP
MVP Esteemed Contributor

Cam,

   There is no good way to get those well know ids. But you can use the portal item id.

basemapGallery.activeBasemap = {portalItem: {id: "588f0e0acc514c11bc7c898fed9fc651"}};

This sets the basemap to "topo".

UlrichOpalka
New Contributor

Hello,

i have the same problem, only that I use
self-defined basemaps.

       myBasemap = new Basemap({
                 baseLayers: [new TileLayer({title: 'Basiskarte', url: arcgisServerUrl + "Basiskarte/Basiskarte2c/                                         MapServer",visible: true}),
                                       id: "Basiskarte",
                                       title: "Basiskarte",
                                      thumbnailUrl: "img/Basemap/Basiskarte.jpg"
        });

        ....

How do I set the basemap active :

basemapGallery.activeBasemap = {id: "Basiskarte"};   ???

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RobertScheitlin__GISP
MVP Esteemed Contributor

Ulrich,

   In your case it would be:

basemapGallery.activeBasemap =‍ myBasemap;

Use the actual basemap object.

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CamCode
New Contributor III

Thanks Robert,

This is mostly working for all maps in my basemap gallery.

However, sadly... there are 4 maps that do not have a portalItem object. Alas their portal item ids are returning null. Any options for me here?

  1. newBasemap: {…}, property: {…}, object: "activeBasemap"}
    1. newBasemap:
      1. baseLayers: (...)
      2. id: (...)
      3. load: ƒ ()
      4. loadError: (...)
      5. loadStatus: (...)
      6. loadWarnings: (...)
      7. loaded: (...)
      8. portalItem: null
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RobertScheitlin__GISP
MVP Esteemed Contributor

Are they maps that would normally have a well known id?

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CamCode
New Contributor III

I do not think so. I'm thinking I may to manually create an associative array of some sorts for these 4. So close, yet so far away....

Edit, Update:

So the above did not work, I tried grabbing the maps that weren't returning a portal item and assigning one to them. However it didn't work, any options to capture these and re-render?

I tried every which way just setting a portal item id within the below format for my failing maps. 

      if (newBasemap.id === 'shaded_relief_light') { 

      } else if (newBasemap.id === 'shaded_relief_dark') { 

      } else if (newBasemap.id === 'world_nav_charts') { 

      } else if (newBasemap.id === 'skyvector_hi_map') { 

      } else if (newBasemap.id === 'skyvector_lo_map') { 

      } if (newBasemap.id === 'skyvector_vfr_map') { 

      }
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MattStayner
Occasional Contributor

Hi all, 

I am running into the same issue. Have there been any updates to the API that make it easier to get the well known string ids for a basemap that is selected from the basemap gallery? That seems silly to have to work with the portal ID, and deal with it not always being there.

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