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| GeoCommunity Mailing List |
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| Subject: | Re: [gislist] Coordinate Geometry assistance needed |
| Date: |
05/22/2007 07:03:48 PM |
| From: |
<David.Keam .. bentley.com> |
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David,
you don't mention what software you have access to.
The process I would follow is to add all of your points in whatever
software you have, and then perform a simple warping using the three
known points. Most systems provide warping capabilities especially
considering that 3 points is a very simple warp. You should be careful
to make sure that your three points are truly representative of the
whole area.
HTH
David Keam
Senior Geospatial Consultant
Bentley Systems Pty Ltd Leading provider of Software for the lifecycle
of the world's infrastructure.
-----Original Message-----
From: gislist-bounces@lists.thinkburst.com
[mailto:gislist-bounces@lists.thinkburst.com] On Behalf Of David T.
Hughes
Sent: Wednesday, 23 May 2007 1:58 AM
To: gislist@lists.thinkburst.com
Subject: [gislist] Coordinate Geometry assistance needed
I have a number of point records from a total station survey recorded
with X, Y, and Z coordinates. I did not (naturally) record the north
orientation at the time and left the default X and Y coordinates to
start with the instrument at 1000, 1000. Okay. Dumb move. Now I need
to plot that in a GIS system that is using UTM Coordinates for Zone 14N,
NAD 83. Of the several hundred points I know the UTM coordinates of
THREE. How can I rotate the original points into the utm systems and
plot them? The data are (or soon will be) in a spreadsheet.
Here's a sample of what the data look like for the three points where I
have UTM coordinates for TS points:
Shot_Num Item_Num Grid_X Grid_Y Grid_ELev X_Coord
Y_Coord Zone NAD
49 117 1008.854 1009.658 99.71 245476 4114418
14
1983
54 116 1012.502 1007.601 99.815 245488 4114421
14
1983
113 139 985.108 1068.04 102.692 245476 4114442 14 1983
I do appreciate all help of any kind. Thanks.
Dave Hughes
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