topic Can a specific map scale be set? in ArcGIS JavaScript Maps SDK Questions

Can a specific map scale be set?

PeterLen — Mon, 01 Jun 2020 00:14:33 GMT

Say I have a basemap that has 15 zoom levels where zoom level 18 has a map scale of 1:2287 and zoom level 17 has a map scale of 1:4514. Is it somehow possible to set the map extent to what it would look like at a scale of 1:3000? I have a situation where 1:2287 zooms me in too close and 1:4514 is a bit too far out. I would like to see the view at a scale of 1:3000, which would be just about right. I have a feeling that the scale can only be set to the nearest zoom level that the current map is set for and if I want to get to a scale of 1:3000, I just need to find a map that has been set to use a zoom level at that scale. I am not in a position to actually reset the levels, such as what is listed in the Set visible scales | ArcGIS API for JavaScript 3.32 , however. Just wondering if it were possible.

Thanks for any thoughts - Peter

Re: Can a specific map scale be set?

ChristianBischof — Fri, 05 Jun 2020 14:00:54 GMT

for development purposes I like to declare the var view; outside of the require statements so I can get and set the view's properties in the browsers developer tools.

Maybe this can help you out. For your particular case I'd do: view.scale = 3000 in the dev tools of the browser and see if it fits my needs.

Re: Can a specific map scale be set?

TheodorosKelekis — Thu, 18 Jun 2020 10:58:35 GMT

You need to set the Constraints.snapToZoom property. to false

In MapView, snapToZoom is true by default.