Bug report #185

values proj out of boundary

Added by dbsint-gmail-com - about 14 years ago. Updated about 11 years ago.

Status:Closed
Priority:Low
Assignee:Gavin Macaulay -
Category:Projection Support
Affected QGIS version: Regression?:No
Operating System:Windows Easy fix?:No
Pull Request or Patch supplied: Resolution:fixed
Crashes QGIS or corrupts data: Copied to github as #:10244

Description

if there are values out of boundary (-180, +180) or on edge in the layer (+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs)
and this layer is shown in another projection (+proj=robin +lon_0=0 +x_0=0 +y_0=0 +ellps=clrk66 +datum=NAD27 +units=m +no_defs), the result will be ...

http://img99.imageshack.us/img99/3414/qgis6as.gif

Dmitry.

data_mapinfo.zip (135 KB) Dmitry -, 2006-07-10 04:42 AM

History

#1 Updated by Gavin Macaulay - almost 14 years ago

  • Status changed from Open to In Progress

#2 Updated by Gavin Macaulay - almost 14 years ago

  • Resolution set to fixed
  • Status changed from In Progress to Closed

The problem here is that projecting from the lat/longs in the mapinfo file to the other projection is not valid when longitudes are greater than 180 (or less than -180). It's more of a problem with the proj4 library than qgis itself.

You can get around this by changing the +lon_0 paramater to be a bit further to the east. For example, setting it to 90 gives a projected map that looks fine.

#3 Updated by Dmitry - almost 14 years ago

Thanks to help. I'm closing this bug.
Dmitry.

#4 Updated by Anonymous about 11 years ago

Milestone Version 0.8 deleted

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