Murty,
It works fine for me using MapServer 5.0.2 with an equirectangular projection using a WGS84 geoid reference whether I'm zoomed to a world view or to a street-level view. Be sure you are setting the scalebar units member accordingly in C#. For example, scalebar.units = (int)OSGeo.MapServer.MS_UNITS.MS_FEET to set the units to feet. However, I have noted that it will appear garbled and squashed in width if you use units which are not meaningful for the current zoomed area. In other words, don't use inches when zoomed to a city or world view.the numbers are too large to display properly. Write a routine that sets the appropriate units based on the delta degrees that you are showing. For example, if the user chose English units (versus metric) and the current viewport spans roughly ~0.5 nautical miles, then set the units to inches. If the viewport is > 0.5 NM and < 1 NM, set the units to feet. Otherwise (the viewport spans more than 1 NM), set the units to miles. You can tweak this idea to suit your needs but this works well for me. Brian NOTE: The views expressed are the author's and do not necessarily reflect the official position of LinQuest Corporation or any of its subsidiaries or the organization providing Internet access. From: [email protected] [mailto:[email protected]] On Behalf Of Murty Maganti Sent: Friday, February 13, 2009 2:20 PM To: [email protected] Subject: [mapserver-users] Scalebar (and C# mapscript) issue Hello I am having strange issue with scalebar. I have scalebar displayed on map (embed) and scale units are set to miles. It has size of 200x10 pixels. It shows up fine on the map. Then at run time (using C# map script), I just change the units to feet or meters and the bar size shrinks (to almost 10 pixels length), which appears strange to me. Why would the scalebar length changes by changing units. Is there any other setting I need to set to maintain the same scalebar size? This works fine (or not noticeable) for maps which have extents at city level. I am testing on map which displays Ontario province (Canada). Also, you need to have projection elements defined at both map and layer level. In my case, the projection is same (WGS 1984). Thanks Murty
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