[OpenLayers-Users] OpenLayers resolutions and scale questions

[Worth Lutz]

Scale is a ratio, for example:   1 inch = 24000 inches   -or-   1/24000
-or-  1 ft. = 24000 feet

 

Here are some helpful links:

 

http://trac.osgeo.org/openlayers/wiki/SettingZoomLevels 

 

https://getsatisfaction.com/opengeo/topics/how_do_i_interpret_the_openlayers
_scale 

 

 

Worth

 

  _____  

From: openlayers-users-bounces at lists.osgeo.org
[mailto:openlayers-users-bounces at lists.osgeo.org] On Behalf Of Rob Hyx
Sent: Thursday, March 21, 2013 9:54 AM
To: openlayers-users at lists.osgeo.org; users at openlayers.org
Subject: [OpenLayers-Users] OpenLayers resolutions and scale questions

 

Hello all, I have a few questions that I can't seem to get cleared up in the
OpenLayers documentation. 

*	Someone asked me what is the units of measurement that are displayed
in the scale control? In other words 1:7M what? Or is it unit-less since
it's a ratio? Sorry if that's a dumb question. 
*	Next, when you manually specify the resolutions of the map (i.e.
map.resolutions = [...,...,...];), what units are those? I checked the map
in the DOM inspector and it says the units are 'degrees', does that mean
decimal degrees? 
*	Also if this or anything related to scale, resolution or Geo-spatial
accuracy in general is documented anywhere for OpenLayers, can someone point
me in that direction?

Thanks in advance!

  _____  

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