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<div class="PlainText">Here is the command:<br>
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v.in.ascii --overwrite input=/Users/cmbarton/sites_out/sites_out.csv output=sites_test separator=, skip=1 x=15 y=16 cat=0<br>
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Here is the projection<br>
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g.proj -p <br>
-PROJ_INFO-------------------------------------------------<br>
name : Universal Transverse Mercator<br>
proj : utm<br>
zone : 30<br>
no_defs : defined<br>
datum : eur50<br>
ellps : international<br>
towgs84 : -131,-100.3,-163.4,-1.244,-0.020,-1.144,9.39<br>
-PROJ_UNITS------------------------------------------------<br>
unit : Meter<br>
units : Meters<br>
meters : 1<br>
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Here is the csv file:<br>
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<br>
Once imported, take a look at the sites in the lower left. You can see the pairs of sites that should be the same location.<br>
<br>
Michael<br>
____________________<br>
C. Michael Barton<br>
Director, Center for Social Dynamics & Complexity <br>
Professor of Anthropology, School of Human Evolution & Social Change<br>
Arizona State University<br>
<br>
voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC)<br>
fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC)<br>
www: <a href="http://www.public.asu.edu/~cmbarton">http://www.public.asu.edu/~cmbarton</a>,
<a href="http://csdc.asu.edu">http://csdc.asu.edu</a><br>
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On Jun 8, 2013, at 12:37 PM, Markus Metz <markus.metz.giswork@gmail.com><br>
wrote:<br>
<br>
> On Sat, Jun 8, 2013 at 8:55 PM, Michael Barton <Michael.Barton@asu.edu> wrote:<br>
>> I just came across something that is very disturbing.<br>
>> <br>
>> I imported a batch of points from a CSV file.<br>
>> <br>
>> 2 points have the same geographic location (they are a single archaeological<br>
>> site occupied at different time periods)<br>
>> <br>
>> I import them into a UTM Zone 30 European Datum 1950 location and they are<br>
>> georeferenced using the following values:<br>
>> <br>
>> x coordinate = -31415 and y coordinate = 4116150<br>
>> <br>
>> Once they are in GRASS, however, they show up in 2 different places on my<br>
>> map. I captured the coordinates from the screen and did a query on both<br>
>> points and the results agree. Here are the reported locations of the 2<br>
>> points<br>
>> <br>
>> East = -31418.8180586, North = 4116177.13863<br>
>> East = -30639.9940711, North = 4116551.27956<br>
>> <br>
>> The coordinates are significantly different from each AND from the imported<br>
>> coordinates of the 2 points. It looks like one of the points is place close<br>
>> to (but not exactly) on the original north coordinate and the other points<br>
>> is placed close to (but not exactly) on the original east coordinate.<br>
>> <br>
>> What is going on here???<br>
> <br>
> Can you provide CSV file with the 2 points and the exact commands you<br>
> used? A simple import should not change the coordinates.<br>
> <br>
> Markus M<br>
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