How to use longitude and latitude to set center for map?

Question

Here is my example:
http://maps.google.com/?q=73,-122

I wanna use longitude and latitude to get the map for flex and put a pin at the middle.

AdrianLeung · Answer

Thank you very much Ken and Shuping 🙂
Just wondering how much would it cost for licensing ArcGIS for Flex map deploy as a map component into part of a commercial mobile project.
Personally I think ArcGIS is much better than Google Map and others(Yahoo, Bing etc), as in the map quality and usage limitation.

SiqiLi · Answer

Agree with Ken. 🙂 If just need to project coordinates between 4326 (GCS_WGS_1984) and 102100 (WGS_1984_Web_Mercator_Auxiliary_Sphere) coordinate systems. You can directly use the WebMercatorUtil class without going through the Geometry Service.

http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/utils/WebMercatorUtil.html

kenbuja · Answer

You don't need to make a call to a geometry service if you are projecting lat/long to or from Web Mercator. The WebMercatorUtil class does this for you. Here's another version of Shuping's code