topic Re: Zoom and Center not working on MapView using MapImageLayer in ArcGIS JavaScript Maps SDK Questions

Zoom and Center not working on MapView using MapImageLayer

DavidKucharski — Fri, 10 Aug 2018 12:56:44 GMT

I declare a MapImageLayer using the following. It is a service hosted locally.

var baseMapLayer = new MapImageLayer({
url: "https://esridev.nsamedia.com/arcgis/rest/services/States/MapServer"
});

I apply it to a new BaseMap.

var basemapDefault = new Basemap({
baseLayers: [baseMapLayer],
title: "Custom Basemap",
id: "myBasemap"
});

I apply the basemapDefault to a Map object and then use that Map object in my MapView

var map = new Map({
basemap: basemapDefault,
layers: [highlightGeographyLyr, colorOverlayLyr, hatchOverlayLyr, locationOverlayLyr, competitorOverlayLyr]
});

var view = new MapView({
container: "viewDiv",
map: map,
zoom: 20,
center: [-119.41793, 36.7783]
});

Everything works correctly except for my zoom and center property. No matter what I put in the zoom or center, the map initially loads that same way.

What I am doing wrong?

Re: Zoom and Center not working on MapView using MapImageLayer

RobertScheitlin__GISP — Fri, 10 Aug 2018 13:22:52 GMT

David,

If your basemap is not tiled then the zoom property has no bearing in your situation.

Re: Zoom and Center not working on MapView using MapImageLayer

DavidKucharski — Fri, 10 Aug 2018 13:27:03 GMT

Robert, thank you again.

My basemap is not tiled. So is there any way to set the my map so when initially loaded it will be at a specific area at a specific scale? I am having a user setup their map the way they want it, so when they come back into it, the map looks the same.

Re: Zoom and Center not working on MapView using MapImageLayer

RobertScheitlin__GISP — Fri, 10 Aug 2018 13:39:07 GMT

David,

Sure you just use the scale property instead of zoom.

Re: Zoom and Center not working on MapView using MapImageLayer

DavidKucharski — Fri, 10 Aug 2018 14:22:00 GMT

Thank you.