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Projection Of Maps

Printed From: CAD Forum
Category: EN
Forum Name: Civil 3D, Map, InfraWorks
Forum Description: Discussion about mapping and GIS applications Map, Civil3D, InfraWorks, MapGuide and Raster Design
URL: https://www.cadforum.cz/forum_en/forum_posts.asp?TID=5415
Printed Date: 22.Sep.2026 at 17:49


Topic: Projection Of Maps
Posted By: ISElation
Subject: Projection Of Maps
Date Posted: 07.Mar.2011 at 18:48
I am working with a drawing and I am unaware of what projection it was drawn in to begin with. I need to export shape files out into Lat Long WGS 84. A coordiante system is not assigned to the map, and I know how to do all of this. How can i figure out what projection the original map was drawn in?


Replies:
Posted By: John Connor
Date Posted: 07.Mar.2011 at 19:18
Where and who did you get the drawing from?

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"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

<<AutoCAD 2015>>

Posted By: ISElation
Date Posted: 07.Mar.2011 at 20:18

It is a map from a telephone company showing where their outside plant information is at. They are one of our clients and they dont know what coordinated system the basemap was drawn to.


Posted By: John Connor
Date Posted: 07.Mar.2011 at 23:57
Are there any Northing and Easting coordinates on the map?

I see you are in the U.S.  What state are you in?  There must be a state plane coordinate system.  Do counties have/use a second coordinate system?

I find it very strange that your own client (the telephone company) has no clue as to what coordinate system was used to in their own drawings.  Have you spoken to someone in their engineering or rights-of-way department?


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"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

<<AutoCAD 2015>>


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