Gridded Topo

[Craig SS]

Gridded topo model from utilities data, results in spider lines outside dinmensions. Constraining with spatial grid, poly clip does not exclude points outside dimensions. Looking for a suggestion to make checked spatial filter work.

 

Thank you

[Alison]

Craig,

 

The Spatial Filter tools at the top of the window will exclude data from the mapping calculations, but will not limit the extents of the grid.

 

If you have a polygon that defines the extents of the xyz data, then you should turn on the Polygon clipping options during grid creation.

 

Here, you can have the program create a polygon (using the Automatic settings), or reference a polygon file or table.

 

You can set the grid cells outside of the polygon to null, so the contour lines in the map will not extent outside of the dataset area.

 

[Craig SS]

Good idea and trialed. A better solution was found examaning and adjusting project dimensions. I now have good gridded topo that appears shifted 250 feet east of actual. Since data originates as state plane coordinates, I suspect I need to choose the eastern zone of New Mexico. I have not run into this problem before and will advise results. If you have another suggestion, let me know.

 

Thank you

[Alison]

Are you seeing this shift when you export to Google Earth?  If so, then yes, I think I would try reassigning the coordinate system in your project through the Coordinates tab.  Unless you are working with some coordinates in your project that are in different units or a different coordinate system, I don't think you should need to re-scan your data to re-establish project dimensions.

[Alison]

Also, here is a KMZ file that I find really handy showing all of the State Plane zones.  I often plot some Lat/Longs from my project along with this just to confirm that I'm using the correct zone.USA_State_Plane_Zones_NAD83.kml

[Craig SS]

I still show a 200' shift in the data. Can you review the Google KMZ [1.6mg] produced from the original dxf file [33mg]? The backwall contours should line up on the aerial photo in Google.

 

Thank you

[Alison]

Craig,

 

We'd be happy to take a look.  Please send the DXF file over to tech@rockware.com along with information about the coordinate system you using, units, etc.

 

Thanks,

Alison

[Craig SS]

Appreciated. The dxf file is 33mb. Does Tech have a shared location?

 

Thank you

[Alison]

Hi Craig,  Here is a link to our client upload site:  https://www.rockware.com/upload-for-rockware/

 

You may need to zip up the DXF file to get it to go through.

 

Best Regards,

Alison

[Craig SS]

Hi Alison

 

Zip file is uploaded. Appreciate technical review.

 

Problem: Importing dxf into xyz points resulted in a 200' shift from actual. Database was state plane NM 3002, converted to utm zone 13N, triangulation contour map viewed in Google, contours not lined up with the mined backwall image. 200' - 250' Shift SW indicated.

 

Thank you

 

Craig