topic Re: setting web mercator !? in ArcGIS Viewer for Flex Questions

setting web mercator !?

MohammedKhamis — Wed, 03 Sep 2014 11:38:48 GMT

Dear ,

My web is coordinate system by web mercator , but I am surprise to give me 7 number in Easting before decimal ( Easting: 6413536.708911874 Northing: 2391766.8369753896 ) , must be 6 number in easting

how can setting coordinate in WGS_1984_UTM_Zone_40N to be 6 number in easting ?

any one know about that

thanks for helping ..

regards,

Mohammed

Re: setting web mercator !?

ArnoldKuilman — Wed, 03 Sep 2014 12:59:34 GMT

You probably projected coordinates outside the valid range of UTM40N. The 'Valid' range of UTM 40 N is approx.from 54 to 60 degrees east.

If the projected coordinate is much below 54 degrees, then you can get a negative value. If it is way above 60 degrees you can easily get a 7 digit easting.

Re: setting web mercator !?

MohammedKhamis — Thu, 04 Sep 2014 11:18:40 GMT

Thanks Arnold for your helping,

Actually UTM40N is 6 digit easting not 7 digit , but I don't know why I get 7 digit !!!???

Regards,

Mohammed

Re: setting web mercator !?

ArnoldKuilman — Thu, 04 Sep 2014 11:28:43 GMT

If you project a lat/long coordinate which is greater than 60 degrees east in the UTM40N zone, it is possible to get a 7 digit Easting. Project to the correct UTM zone to get proper 6 digit coordinates.

Re: setting web mercator !?

RhettZufelt — Fri, 05 Sep 2014 20:22:53 GMT

From your original post

"

Dear ,

My web is coordinate system by web mercator , but I am surprise to give me 7 number in Easting before decimal ( Easting: 6413536.708911874 Northing: 2391766.8369753896 ) , must be 6 number in easting

how can setting coordinate in WGS_1984_UTM_Zone_40N to be 6 number in easting ?

any one know about that

".

"My web is coordinate system by web Mercator". If that means that your coordinate system "is" web Mercator, you should not expect to see UTM coordinates, yet web Mercator which can have 7 digits also.

Re: setting web mercator !?

MohammedKhamis — Sun, 07 Sep 2014 06:25:13 GMT

Thanks Arnold & Rhett ,

I was confused between Mercator and UTM ...

As you Know , in Flex , it give me three option :
1- Geographic (decimal degrees )

2- Geographic (degrees,minutes,seconds )

3-Web mercator

Projection or coordinate system of my web must be WGS_1984_UTM_Zone_40N ,
so my question how can get this coordinate system on the Flex ????

Many thanks & regards,
Mohammed

Re: setting web mercator !?

AnthonyGiles — Mon, 08 Sep 2014 07:54:48 GMT

Mohammed,

It all depends where you are getting your base data from. If you are using the online basemaps then your are going to be stuck with using the options you have mentioned above. By default the viewer will take on the projection of your first basemap that you add to the application, so to have the projection of your application in UTM Zone 40 you will need to serve your own base maps that have also been created in the same projection.

You can override the default projection of the first basemap using the wkid attribute in the map tag:

http://resources.arcgis.com/en/help/flex-viewer/concepts/index.html#/Map_content/01m30000005p000000/

The wkid for UTM zone 40 will be 32640. But as I say i dont think you can just change this if you are using cached maps in a different projection.

Regards

Anthony