topic Re: Map Coordinates in ArcGIS API for Flex Questions

Map Coordinates

CoreyLunsford — Thu, 03 Nov 2011 14:53:34 GMT

Hello. I've been recently tasked to create an online map of our database. Unfortunately, I have never had any experience web-mapping anything and am having to teach myself the basics as I go. I imagine I'll haunt this forum for quite sometime but, for now, I have a simple question.

I am trying to set up an initial extent and the example given is for an extent around Australia:

<map initialextent="12042000 -5619000 17795000 -952000" top="40">

My question is: Can someone please define these coordinates? I've sort of worked out that they are Xmax, Xmin, Ymax, Ymin, but what coordinate system is it and is there an easy way to convert them from lat long. Also, what is "Top=40?"

Sorry for the very basic questions but any assistance would be greatly appreciated.

Re: Map Coordinates

AYounas — Thu, 03 Nov 2011 15:43:15 GMT

Hi,

To set up the extent you may use this link:http://help.arcgis.com/en/webapps/flexviewer/extenthelper/flexviewer_extenthelper.html

top - The vertical distance in pixels from the top edge of the map to the top edge of the application. The default is 0 pixels, but 40 is a best practice when using the HeaderController widget since it typically covers the top 40 pixels.

You may read further about this on: http://help.arcgis.com/en/webapps/flexviewer/help/index.html#//01m300000018000000

I hope this helps.

Thanks,

Adnan

Re: Map Coordinates

CoreyLunsford — Thu, 03 Nov 2011 15:53:22 GMT

Hi,

To set up the extent you may use this link:http://help.arcgis.com/en/webapps/flexviewer/extenthelper/flexviewer_extenthelper.html

top - The vertical distance in pixels from the top edge of the map to the top edge of the application. The default is 0 pixels, but 40 is a best practice when using the HeaderController widget since it typically covers the top 40 pixels.

You may read further about this on: http://help.arcgis.com/en/webapps/flexviewer/help/index.html#//01m300000018000000

I hope this helps.

Thanks,

Adnan

That was extremely helpful, Adnan. Thank you!