[QGIS-trac] [Quantum GIS] #3825: Two decimal places for symbology in map unit is not suited for lat-long data

Quantum GIS qgis at qgis.org
Sat May 14 05:58:50 EDT 2011


#3825: Two decimal places for symbology in map unit is not suited for lat-long
data
--------------------------------------------------------+-------------------
   Reporter:  mayeulk                                   |              Owner:               
       Type:  bug                                       |             Status:  new          
   Priority:  major: does not work as expected          |          Milestone:  Version 1.7.0
  Component:  Vectors                                   |            Version:               
   Keywords:  map unit, size, width, offset, symbology  |   Platform_version:               
   Platform:  All                                       |           Must_fix:  No           
Status_info:  0                                         |  
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 In new symbology, when selecting size, width, offsets etc. in "map unit",
 the minimum value is either 0.00 or 0.01, because only 2 decimal places
 are allowed.
 At 45° North latitude, 0.01 degree=786 meters, which renders symbology
 based on map unit useless on lat-long data at most scales.
 It is impossible to chose for instance "0.0001" (about 8 meters) to
 represent a small road or a track.
 The resolution should be at least 5 decimal places to support a minimum of
 "0.00001" (80cm), which makes sense for "street maps" (e.g. with "Open
 Street-Maps" data in lat-long): sometimes you find a path in very narrow
 streets, with buildings  less than two meters away from each other.

-- 
Ticket URL: <http://trac.osgeo.org/qgis/ticket/3825>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS supporting GDAL/OGR, PostGIS, and GRASS formats, and Web Services


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