Opened 12 years ago

Last modified 10 years ago

#1373 new defect

Wrong stereographic grid tracing and labeling in stereographic projection

Reported by: alf Owned by: grass-dev@…
Priority: normal Milestone: 6.5.0
Component: Display Version: svn-develbranch6
Keywords: d.grid Cc:
CPU: Unspecified Platform: All

Description

When using stereographic projection set, for example, at the south pole, d.grid's geographical output is messy: grids are not completely traced and the labels accumulates at the corners at various angles.

Find attached a screenshot of the output for a 1000x1000 km area centered at the south pole, and a sample location (to reproduce the screenshot, use: d.grid -g size=10).

Regards,

Alessandro Frigeri

Attachments (2)

stereo_geo-grid.png (10.3 KB ) - added by alf 12 years ago.
Geogrid and labels output, for stereographic projection centered at Earth's south pole
earthsouth_grid.tar.gz (4.9 KB ) - added by alf 12 years ago.
Example location in stereographic projection - Earth's south pole

Download all attachments as: .zip

Change History (4)

by alf, 12 years ago

Attachment: stereo_geo-grid.png added

Geogrid and labels output, for stereographic projection centered at Earth's south pole

by alf, 12 years ago

Attachment: earthsouth_grid.tar.gz added

Example location in stereographic projection - Earth's south pole

comment:1 by hamish, 12 years ago

Keywords: d.grid added
Milestone: 6.5.0

known bug.

for the stereographic images on the raster screenshots page (1,2) the work-around I used was to use v.mkgrid in a lat/lon location which I then pulled into the stereographic projection with v.proj.

(1) http://grass.osgeo.org/screenshots/images/day_on_earth_N.png (2) http://grass.osgeo.org/screenshots/images/day_on_earth_S.png

Hamish

comment:2 by hamish, 10 years ago

hopefully the label text is a little better now. grid lines around anomalies still need work.

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