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Point File Coordinate Transformation

7 REPLIES 7
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Message 1 of 8
rreed1
379 Views, 7 Replies

Point File Coordinate Transformation

Hello,

Back in October a guy named Matt was struggling with transforming a point file from NAD 27 to UTM. The solution to his problem was apparently in the point file format the convert points had to be set to grid-ground. I don't see this setting in the point file format dialogue box.

I've set up a point file format with UTM84-12N as the coordinate zone transformation zone and I'm bringing in those points into my current drawing that is set up in State Plane - International Feet (MT83IF). However, when I import the points, as with Matt, the imported points have the same northing and easting as the UTM84-12N points - no transformation has been performed.

I have checked all of the settings I can think of. What am I missing?

Thanks.

Russ
7 REPLIES 7
Message 2 of 8
Anonymous
in reply to: rreed1

While I am not sure why this is not working in Civil3D, you might want to
try CorpsCon from the Army Corps of Engineers. It is a free program that can
batch project points in an ASCII text file from one coordinate system or
datum to another. Here is a link to the Corps' website:
http://crunch.tec.army.mil/software/corpscon/corpscon.html

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Tripp Corbin, MCP, CFM, GISP
Associate Vice President, GIS/Mapping
ESRI Authorized Instructor
Keck & Wood, Inc.
www.keckwood.com
(678) 417-4013
(678) 417-8785 fax

Keck & Wood, Inc offers instructor led and virtual training for ESRI's
ArcGIS & ArcView software.
Please visit www.keckwood.com for more information including a schedule of
upcoming classes.

wrote in message news:5516144@discussion.autodesk.com...
Hello,

Back in October a guy named Matt was struggling with transforming a point
file from NAD 27 to UTM. The solution to his problem was apparently in the
point file format the convert points had to be set to grid-ground. I don't
see this setting in the point file format dialogue box.

I've set up a point file format with UTM84-12N as the coordinate zone
transformation zone and I'm bringing in those points into my current drawing
that is set up in State Plane - International Feet (MT83IF). However, when
I import the points, as with Matt, the imported points have the same
northing and easting as the UTM84-12N points - no transformation has been
performed.

I have checked all of the settings I can think of. What am I missing?

Thanks.

Russ
Message 3 of 8
sboon
in reply to: rreed1

It should be a three step process:
- Set the coordinate system of the current drawing from the Toolspace Settings tab.

- Create a point file format to suit the data that you intend to import. Make sure that you switch the Northing and Easting headers to Grid. See the attached image for an example.

- When you import the points using the new format make sure that the "Do coordinate transformation if possible" box is checked.
Steve
Expert Elite Alumnus
Message 4 of 8
sboon
in reply to: rreed1

It should be a three step process:
- Set the coordinate system of the current drawing from the Toolspace Settings tab.

- Create a point file format to suit the data that you intend to import. Make sure that you switch the Northing and Easting headers to Grid. See the attached image for an example.

- When you import the points using the new format make sure that the "Do coordinate transformation if possible" box is checked.
Steve
Expert Elite Alumnus
Message 5 of 8
rreed1
in reply to: rreed1

SBoon,

The attachment you included was great!

Thanks for the help.

Russ
Message 6 of 8
sboon
in reply to: rreed1

Glad to be able to help.

BTW I highly recommend that you cross check your results using Corpscon or another program. There are also several web pages that will allow you to enter a coordinate in one system and get a result in another.

Steve

PS: Matt Kolberg, did you ever get it to work for you?? Message was edited by: SBoon
Steve
Expert Elite Alumnus
Message 7 of 8
dvikse
in reply to: rreed1

How about a link to a program for converting batch points in Canada (Alberta)? Thanks in advance.
Message 8 of 8
dana.probert
in reply to: rreed1

i like a cheap program called coordtrans. i am pretty sure it includes canada. i used to find the LDT point formats would choke on LL to UTM or State Plane conversions, so i started using coordtrans and I havent tried it since.
http://franson.com/
Dana Probert, P.E.
Technical Marketing Manager, Civil Engineering
Autodesk
Blog: BIM on the Rocks
Learn More About BIM for Infrastructure

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