The DEM capture was produced from 2002 orthophoto at 1:10,000. It includes elevations on a 40m grid spacing together with break lines along all visible terrain impacting features (road edges, drainage...
I thought I was getting a complete map but this file is just a bunch of lines. Where are the road labels and other features?
Only elevation information is included, either as DEM or contour, depending on the file you’ve chosen. The road edges frequently appear as break lines in the DEM, giving the appearance of unlabe...
How do I use LiDAR?
LiDAR (Light Detection And Ranging) bare earth elevation models in GeoTiff format are easy to use and highly accurate. This video will help you get started.
I’ve purchased adjacent tiles of parcel and they’re polylines clipped at the tile boundary, but I want full parcels as polygons. How can I connect line work from adjacent tiles together to complete the parcels which cross the tile boundary into single features and/or convert the geometry to polygons?
Polygons would not be a good representation of the data in this case because the geometry of the parcels is clipped to the boundary of the tiles, so the area, perimeter, and parcel boundaries of the p...
I’ve purchased adjacent tiles of contour lines. How can I connect all the lines end to end at the tile boundaries?
Copy the line work from one file, open the file for the adjacent tile and use the command “paste to original coordinates” to have them together in one DWG. Use the command PEDIT (polyline ...
How can I use the elevation attributes to label my contour lines in CAD?
You will need to create an attribute definition. Here are a few articles that describe the process: How to: Label Coordinate in AutoCAD Tutorial: Create attributes
The DWG files of Ontario Base Map (OBM) does not show the labels for elevations etc. How can I use the properties of the individual polylines to produce annotation?
Here’s a tutorial that shows how to use the features’ properties to apply a label. This is for the latest edition of the software, but there should be similar options available in whatever...
How can I generate a contour file or tin surface from the survey points and break lines in a DEM?
Here are tutorials that demonstrate the general process, although a some steps such as creating the break lines have already been done by First Base Solutions. Youtube: Civil 3D Surface Creation Youtu...
I bought a DWG format of Ontario Base Map (OBM) and it’s 30 separate files! Is there an easy way to load them into CAD all at once?
Yes! From the task pane, select “Data”/”Attach Source Drawings” and choose the layers you would like to load. Learn more
What do the numbers in the file name mean?
The first letters tell the data type, “orth” for orthophoto, “line” for a digital elevation model, “contour” for contour lines. The next 2 numbers are the UTM zone,...