search

khanhlnq / jvnmobilegis

Automatically exported from code.google.com/p/jvnmobilegis
1 stars 0 forks source link

Option to select a different SRS #22

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
After fetching the capabilities, have an option to choose an alternative
SRS. I suspect it uses the first listed SRS now, right?

Original issue reported on code.google.com by bveldk...@gmail.com on 31 Mar 2008 at 12:06

GoogleCodeExporter commented 9 years ago 
JVNMobileGIS is using EPSG:4326

Original comment by khanh....@gmail.com on 8 Apr 2008 at 8:28

GoogleCodeExporter commented 9 years ago 
It doesn't look at the capabilities? What happens if 4326 is not available?

Original comment by bveldk...@gmail.com on 8 Apr 2008 at 8:44

GoogleCodeExporter commented 9 years ago 
No, JVNMobileGIS doesn't use returned SRS list from server. Mobile device 
calculation
power is not strong enough to do the SRS conversion.
EPSG:4326 is supported by almost all WMS servers. If not, then JVNMobileGIS will
alert error.

Original comment by khanh....@gmail.com on 8 Apr 2008 at 8:51

GoogleCodeExporter commented 9 years ago 
I'm not sure you understand, client side reprojection does have nothing to do 
with my
request. 

The SRS list is just a list of SRS's that the server can use to draw an image. 
You
ask for a specific SRS (from the list), if the server supports it, it returns 
the
image. EPSG:4326 is definitely not supported by all WMS servers, that mostly 
depends
on how they are configured. 

Just asking for 4326 may cause an expensive server side projection, whereas 
asking
for the default projection may give a faster response.

Original comment by bveldk...@gmail.com on 8 Apr 2008 at 5:42

GoogleCodeExporter commented 9 years ago 
Client side still need to calculate the bounding box. For mobile, it's a quite 
heavy
task. But now mobile devices are more powerful, we will consider and add this 
feature
in future.
Hopefully the next improved version of JVNMobileGIS will be released in June 
2008.
Thanks for your suggestion.

Original comment by khanh....@gmail.com on 9 Apr 2008 at 1:57

GoogleCodeExporter commented 9 years ago

Original comment by khanh....@gmail.com on 24 Apr 2008 at 3:10