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12/28/2006 12:26:24 PM
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jbrown
Posts 45
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lets say i create a line shapefile...
i click once to start drawing my line...
i was taught that down at the bottom where it says "Segment: 1234.342"
was the accurate measurement (in the unit of measurement i specified in View Properties) of the line as i extend it.
i never used this, and never bothered to check to see whether or not that was true until now.
my 181 foot long line comes out to 968 map units.
Is this something thats possible and ive just screwed up somewhere?
Hopefully i explained this well enough for other people to understand.
Thanks
-Justin
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12/28/2006 2:02:56 PM
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Ben
Posts 26
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While I am not the developer and so can not speak with authority, I did some experimenting with some of my own data. I can only conclude that the reading at the bottom left corner is in pixels even though it says that it is in "(map units)".
I say this for the following reasons. When I create a new line layer and screen digitize over an aerial photo, the readout is way off. It is not even a simple unit conversion factor off such as feet to meters. If I end the edit and then use the measure tool I get the same false reading. However, I quite by accident double clicked to end my measurement and the "Calculator" dialogue that comes up has the correct measurements. I also edited the table to add a length field. Then I used the "SegLength" function of the Calculator to get the length of each line. It puts the correct length in the units specified in the projection information into the table.
So, the system seems to know the correct measurements, but the readout is (based on the resolution that I have my screen set) reading out in pixels. This is at best misleading and at worst a bug. I for one would like to see this get changed to read out in the chosen map units as the prompt suggests.
Ben
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12/28/2006 2:24:17 PM
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jbrown
Posts 45
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thanks for experimenting Ben
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1/2/2007 9:39:27 AM
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Dave
Posts 209
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Hi,
This is something that I noticed shortly after the first release and is very misleading. 2007 was not converting the length from screen size to world size. This has been resolved and will be part of the next release.
Dave Priest
AccuGlobe Product Manager
DDTI
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