I have 1 meter digital elevation model data available as an .img file. Does anyone know if there is a way to import this into Carlson Survey (2017) so that it could be used to prepare a surface model?
Thanks.
On a side note, I also have tried importing a shp file with contours and all of the contour lines come in with zero elevations.
When you import the shape file, you have to check a box that tells the software to use attribute to assign elevation, and I also always import the GIS data.
That "should" work. It has for me. It will be largely dependent upon the data that was used to create the shape file.
What Jimmy said (I do not know about "img" files though):
SirveyorBill, post: 421597, member: 199 wrote: I have 1 meter digital elevation model data available as an .img file. Does anyone know if there is a way to import this into Carlson Survey (2017) so that it could be used to prepare a surface model?
To my knowledge, the only way to import this type of file is via the Import Cloud command found within the Point Cloud module.
That does get me one step closer, but I still have some issues to work through. The contours now have elevations (yeah!), but they are coming in as a conversion from metric (the data does convert properly in the horizontal from the shape file which is in UTM).
So the two foot contours now have a difference of elevation of 6.56 feet or two meters. Now I have to figure out how to scale vertically.
Thanks for the tips.
SirveyorBill, post: 422166, member: 199 wrote: That does get me one step closer, but I still have some issues to work through. The contours now have elevations (yeah!), but they are coming in as a conversion from metric (the data does convert properly in the horizontal from the shape file which is in UTM).
So the two foot contours now have a difference of elevation of 6.56 feet or two meters. Now I have to figure out how to scale vertically.
Thanks for the tips.
I just ran into this problem.
Edit pulldown menu>Elevations>Scale>
enter the conversion to go from meters to feet, and you should be there.
That sounds like it would do what I need but I don't find Elevations on the edit pulldown.
I am using Carlson 2017 with Intellicad.
SirveyorBill, post: 422273, member: 199 wrote: That sounds like it would do what I need but I don't find Elevations on the edit pulldown.
I am using Carlson 2017 with Intellicad.
Sorry Bill, it is under the Change option under the edit menu. I am using Carlson Survey with embedded AutoCAD 2016
Thank you Jimmy! I never knew that was there and it is the final step I need to make this work. Being able to use this data is going to be incredibly useful for us. I owe you a beer!
Glad I could help Bill. I was working with some Lidar data a few weeks ago, and had to work through this myself. It took me a little while to figure it out.
I must have missed something here before, this has got it working now. Thank you Brad.
Bill I was about to ask if you were working with lidar data. I have been very interested in how to apply this data.
I have a lot to learn but in my area we have lidar data sets. If these values make sense I have a nominal point spacing of 0.7 meters and RMSEz 9.3 cm
Is that sufficient to create 2' contours from if i new how to apply.
I have been to a few seminars that have reviewed lidar and how the collect it and all that good stuff but have yet to learn how to use the data.
Ladd Nelson, post: 421675, member: 307 wrote: To my knowledge, the only way to import this type of file is via the Import Cloud command found within the Point Cloud module.
Ladd,
Can't he use the Grid File Utilities function in Carlson Survey? I have used this before for img raster files.
1. Type GFU at the command line to get this menu.
2. Select "Import Grid" and then you get this menu.
3. Select "Import Esri" and then select the img file you want to convert. This one here is for some County Lidar data that I downloaded from USGS.
4. Now it asks you for what coordinate system you want it transformed into. This dataset is natively in Lat-Long meters, but I want Florida State Plane West Zone is US feet.
5. Now you wait for it to import. If it is real big it will take a long time or it might lock up if its too big. If its to big, you need to cut down the raster file to a mangable size using something like Global Mapper or ESRI GIS.
6. Once it is done importing, It takes you back to this menu.
7. Select Export Grid and you get this menu:
8. Select "Carlson Triangulation File". And then give a file name for the Carlson TIN file to create.
Now you have a Carlson TIN file that you can use.
That's awesome Bow Tie!!!
I will try this with that Lidar set I have and see how it works.
Bow Tie Surveyor, post: 422643, member: 6939 wrote: Ladd,
Can't he use the Grid File Utilities function in Carlson Survey? I have used this before for img raster files.
1. Type GFU at the command line to get this menu.
2. Select "Import Grid" and then you get this menu.
3. Select "Import Esri" and then select the img file you want to convert. This one here is for some County Lidar data that I downloaded from USGS.
4. Now it asks you for what coordinate system you want it transformed into. This dataset is natively in Lat-Long meters, but I want Florida State Plane West Zone is US feet.
5. Now you wait for it to import. If it is real big it will take a long time or it might lock up if its too big. If its to big, you need to cut down the raster file to a mangable size using something like Global Mapper or ESRI GIS.
6. Once it is done importing, It takes you back to this menu.
7. Select Export Grid and you get this menu:
8. Select "Carlson Triangulation File". And then give a file name for the Carlson TIN file to create.
Now you have a Carlson TIN file that you can use.
How did you find this Grid File Utilities? Doesn't look like something you would just grab from a pull down menu.
This seems to be just what I need to do exactly that, use County lidar data to be able to generate a surface. I got all the way to creating a tin (35 mb!), but have not been able to get it to draw a surface from that, probably too large. Will have to figure out how to cut down to the area of interest.
Bow Tie Surveyor, post: 422643, member: 6939 wrote: 1. Type GFU at the command line to get this menu.
Brad Ott, post: 422797, member: 197 wrote:
Yes, got that. I mean how did he find this routine to begin with.
SirveyorBill, post: 422991, member: 199 wrote: Yes, got that. I mean how did he find this routine to begin with.
I think somebody on this board put me on to it, but I'm not sure about that.
Grid File Utilities is also good for comparing surfaces by subtracting one surface from another to create a TIN file of the delta elevations.
This board rocks!
I tried this on Carlson Survey OEM 2016, and Grid File Utilities is not available unless you have the Civil Module. This was from an email to Carlson Tech Support.
