topic Re: Auto basemap switch as scale change - Again in ArcGIS Viewer for Flex Questions

Auto basemap switch as scale change - Again

ShaningYu — Fri, 10 Aug 2012 12:58:44 GMT

In my thread at http://forums.arcgis.com/threads/63288-Map-switch-as-scale-change, I requested how to auto-switch basemap as scale change. Mr. Robert, the author (also the best ArcGIS Flex expert as I know) of the eMapSwitch, provided me the solution. It works if I make the scale change using the Scalebar to zoom-in.
In one of my application, when a feature (e.g. a parcel) is found and then the map is zoommed-in the parcel. The scale is changed to 1:1128 (the smallest scale), but the basemap is on the default one US Areial that does not have the map at this scale. How can the auto-switch basemap also work on this senario?
Another question is how auto-switch to for zoom-out with the default basemap.
Thanks.

Re: Auto basemap switch as scale change - Again

RobertScheitlin__GISP — Sat, 11 Aug 2012 02:20:58 GMT

Shanning,

There are two option in the eMapSwitcherWidget that are doumented in the ReadMe.txt (I know most people don't even consider reading the documentation when they can just have some one tell them what to do...). They are the autoswitchtoscale and forcescaleonswitch.

Re: Auto basemap switch as scale change - Again

ShaningYu — Tue, 14 Aug 2012 13:23:41 GMT

Actually, I tested both autoswitch and foreswitch, but some results are not expected. For instance, I set autoswitch on US Aerial. If I change scale to 1:1128, the background displays 'Map Data Not Yet Available' even though the eMapSwitch tab shows it is on US Aerial (the default basemap). I have to click the US Aerial again and then the autoswitch functions well (to the right basemap I set).
When I play Zoom-out, it always displays US Shaded Relief (not the default, neither autoswitch nor foreswitch) even though the eMapSwitch tab shows it is on US Aerial.
My suspection is that loading Shaded Relief from the server could take shorter time than loading US Aerial probably due to the loading size issue. This is only my guess.

Re: Auto basemap switch as scale change - Again

RhettZufelt — Wed, 15 Aug 2012 00:09:56 GMT

Robert,

I noticed in the version 3 eMapSwitcherWidget that the following tags are not in the readme/xml, but are supported by the mxml.

<expandlayeritems>true</expandlayeritems>     <labels>     <basemapslabel>Basemaps</basemapslabel>     <layerlistlabel>More...</layerlistlabel>     </labels>

Figured they got overlooked in the readme updates.

R_

Re: Auto basemap switch as scale change - Again

ShaningYu — Fri, 23 Aug 2013 16:41:39 GMT

Thanks for your response. In my thread cleanup, I have added the credit to you.

Re: Auto basemap switch as scale change - Again

RobertScheitlin__GISP — Fri, 23 Aug 2013 17:57:11 GMT

Rhett,

Thanks for the info. I have updated the XML and added a eMapSwitcher Widget Configuration.pdf to the download.

Re: Auto basemap switch as scale change - Again

ShaningYu — Tue, 27 Aug 2013 15:44:43 GMT

Robert: Thanks for your update. Currently, I am working on mainly on Silverlight. Once I get a chance to work on Flex, I will definitely use the components you have updated.