Converting NAD83 meters to NAD83 NF Coords

[slntkrr]

Ok so i downloaded a shape file from the National Wetlands website. It turns out it is in meters and we need it in feet. Is there a way to convert it to the correct coordinates we need?

 

Thanks.

[Cad64]

Scale it by a factor of 3.28083989501312.

 

http://www.calculateme.com/Length/Meters/ToFeet.htm

[Hippe013]

Setup your coordinate system and use MAP > IMPORT and it should fall right into place. You shouldn't need to convert anything.

[slntkrr]

Setup your coordinate system and use MAP > IMPORT and it should fall right into place. You shouldn't need to convert anything.

 

I have it set up for "NAD83 Pennsylvania State Planes, North Zone, US Foot". Nation Wetlands has it set up for "NAD83 Pennsylvania State Planes, North Zone, Meter" file come up waaaayyyy different. Its not a mathamatical conversion problem but a coordinate conversion problem.

 

I cant bring in the wetlands shapefile from meters to foot. I have tried bringing in as meters then creating a shapefile and under options converting to the system i need. I crash everytime.

[slntkrr]

Oh and I have tried forcing the meters into the foot with the import and it still doesnt fall in place.

[Cad64]

I've moved your question to the Civil3D section.

[Hippe013]

Oh and I have tried forcing the meters into the foot with the import and it still doesnt fall in place.

 

I set up my coordinate system to whatever I may be using. Type: mapimport Select: shape file, Verify the import coordinates. Hit ok. Should fall right into place. If not, then something else is going wrong. Shouldn't have to specify feet or meters. ACAD does this for you. If you are still having trouble, upload your files and I'll take a look and if nothing else I'll convert the files and upload them back to you.

[slntkrr]

I guess I'm a litle confused then. I just cant seem to get this. Maybe I'm looking at it wrong, not sure. The drawing is at a 105 mb. Too large to put on here.

[Cad64]

The drawing is at a 105 mb. Too large to put on here.

 

You can upload it to Rapidshare for free and then post a link here.

[Hippe013]

Or you could just upload a dwg that has a bounding box (polyline) around your project area (exclude your project linework) but then include the shape file and other necessary files that you are trying to bring in. I'll see about getting the shape file to fall within the bounding box.

[slntkrr]

http://rs951.rapidshare.com/files/361529450/CONUS_wet_poly.zip

 

http://rs568.rapidshare.com/files/361532545/test.dwg

 

Thanks guys. The first link is the shap file of the wetlands. The second is a drawing of the northern state of pa. Thanks in advance if you can get this to work.

[Hippe013]

After looking at the files that you posted I think I know whats going on. I typed in MAPIMPORT selected the .shp file and then i noticed that the "Input Coordinate" field is . So then I looked at the .prj file and I find that the input coordinate should be NAD_1983_Albers. I do not have this in my AutoCAD. The code for this projection I believe is us_alb83 and has the following parameters:

 

Projection Units: meters

Spheroid: GRS80/WGS84

1st Standard Parallel: 29 deg 30 min N

2nd Standard Parallel: 45 deg 30 min N

Central Meridian: -96 deg (W)

Latitude of Origin: 23 deg N

False Easting: 0

False Northing: 0

 

So if you can define this coordinate system in your AutoCAD then use this as your input coordinate system. The above specs can be found in the .prj file and can be opened with notepad. I hope that this helps you. I'll be looking into getting projections defined in AutoCAD.

[Hippe013]

By gosh i think I did it! I created a new coordinate system using the above specs. That process is under MAP > TOOLS > DEFINE GLOBAL COORDINATE SYSTEM. After defining the new coordinate system then I used that as my input coordinate in MAPIMPORT. See if that works for you.

[slntkrr]

By gosh i think I did it! I created a new coordinate system using the above specs. That process is under MAP > TOOLS > DEFINE GLOBAL COORDINATE SYSTEM. After defining the new coordinate system then I used that as my input coordinate in MAPIMPORT. See if that works for you.

 

 

Hey Hippie,

"Wow" is all I can say!! Thank you for all your help. I never new it was possible to do that. Sorry but i havent been working on this for the last week till today. Still cant believe we/you got it to work!!

 

Thanks again,

Tim

[Hippe013]

Hey, You bet Tim! I am glad that it worked for you.