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Warn if .prj file is missing #10417
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Author Name: Gavin Macaulay - (Gavin Macaulay -) The units used for line lengths is metres if the line is less than 1000 m, and kilometres if greater. Similarily for area, where the cutover from m^2 to km^2 is 1000 m^2. What do you mean when you say that the value is multiplied by 100? When the length units change from metres to kilometres, the value is divided by 1000, and for area the value in m^2 is divided by 1000000 when displayed as km^2 |
Author Name: neteler-itc-it - (neteler-itc-it -) OK, I tested again and the situation is worse :-) I zoomed to a building in (approximate scale while measuring is 1:500) My chosen building is several meters long (maybe 22m). I start I am reading a SHAPE file with TMERC based projection (similar to UTM). HA, got it - the proj file is missing... it would be probably cool if Markus |
Author Name: Gavin Macaulay - (Gavin Macaulay -) Good. I'll make this an enhancement against 0.9. |
Author Name: leolami - (leolami -) I think the bug is fixed in 0.9.2 |
Author Name: Markus Neteler (Markus Neteler) ... so I close it. Thanks.
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Author Name: Anónimo (Anónimo) Milestone Version 0.9.2 deleted |
Author Name: neteler-itc-it - (neteler-itc-it -)
Original Redmine Issue: 358
Redmine category:vectors
Assignee: Gary Sherman
Hi,
the line and area measurement tools show
wrong units:
starting with meters[qm] they switch to km[km2] once we digitize the line
the value is multiplied by 100
This seems to appear both in 0.8 preview2 and HEAD
Tested with a Transverse Mercator map (Gauss-Boaga, Italy)
regards,
Markus
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