comp.lang.idl-pvwave archive: archive » Preserving coordinate transformation

Home » Public Forums » archive » Preserving coordinate transformation

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Preserving coordinate transformation [message #50823]

Tue, 17 October 2006 03:47

Sverre Solberg
Messages: 18
Registered: February 2005

Junior Member

I plot a map (by the MAP_SET etc routines) inside a widget_draw area
using "/button_events". When the user is clicking on the map the
program use the event (x and y) and the "convert_coord" to compute the
geographical coordinates of the position. However, when making other
plots in between, opening other draw widgets, the built-in coordinate
transformations (device->data) changes and destroys the conversion to
geo. coord. next time this window is clicked on. How could I store the
coordinate transformation? If it was a simple 2D plot, without the map,
I could just save the !x and !y variables and compute the conversion
myself, but that dont work when there's a map projection. I then need
to know how idl converts from device coordinates (returned by widget
draw) to map coordinates (lat/long) and I havent been able to find out
that. Any hints?

Sverre

Report message to a moderator

[Message index]

Preserving coordinate transformation

By: Sverre Solberg on Tue, 17 October 2006 03:47

Previous Topic:	Segmentation fault: IDL 6.3 on Debian SID
Next Topic:	Re: Preserving coordinate transformation

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 04:51:34 PDT 2025

Total time taken to generate the page: 1.04148 seconds