Opened 13 years ago

Closed 13 years ago

#3508 closed bug (fixed)

Custom projection issues

Reported by: dr Owned by: nobody
Priority: major: does not work as expected Milestone: Version 1.7.0
Component: Projection Support Version: Trunk
Keywords: Cc: dr, gislab, alexbruy
Must Fix for Release: Yes Platform: Windows
Platform Version: Awaiting user input: no

Description

Create custom projection: 

+proj=aea +lat_1=52 +lat_2=64 +lat_0=0 +lon_0=105 +x_0=18500000 +y_0=0 +ellps=WGS84 +units=m +no_defs

Open vector layer (in attachment). Enable on the fly CRS transformation and set created custom projection.

Issues:

  1. Zoom to layer extent does not work and layer is invisible;
  2. Open attribute table, select any row and press "Zoom map to selected rows" button. Layer becomes visible, but if change zoom level with mouse wheel - any features or layer at all disappears from map canvas.

Attachments (3)

l2.zip​ (198.3 KB ) - added by dr 13 years ago.
aea_proj_in_grass64.png​ (25.2 KB ) - added by neteler 13 years ago.
Map shown in GRASS 6.4 from -180° to +180°
aea_proj_in_grass64_shifted.png​ (25.0 KB ) - added by neteler 13 years ago.
Map shown in GRASS 6.4 from -50° to+50°

Download all attachments as: .zip

Change History (7)

by dr, 13 years ago

Attachment: l2.zip​ added

comment:1 by gislab, 13 years ago

related to #2426

by neteler, 13 years ago

Attachment: aea_proj_in_grass64.png​ added

Map shown in GRASS 6.4 from -180° to +180°

by neteler, 13 years ago

Attachment: aea_proj_in_grass64_shifted.png​ added

Map shown in GRASS 6.4 from -50° to+50°

comment:2 by neteler, 13 years ago

This is an issue of the global wrap around apparently not handled correctly. For illustration, I have imported the map in GRASS 6.4.1. The global wrap around code is tricky, see ​here and ​here for the implementation in GRASS, perhaps useful for inspiration.

comment:3 by neteler, 13 years ago

See also #2349

comment:4 by jef, 13 years ago

Resolution: → fixed
Status: new → closed

duplicate of #2426

Note: See TracTickets for help on using tickets.