Standard Topo Layers

The list of layers below includes what we call our standard AirWorks layers, which will always be automatically included when you select either of these bundles: “2D + Topo”, “Topo” and “Topo Advanced” in the order form during project check-out.

If you select the “2D + Topo” bundle, your deliverable will also include all of the layers listed in our Standard 2D Layers list.

After selecting your bundle, you will also be able to select additional layers and deliverables (different file types, etc.). Here, you can see our complete list of additional layers, as well as our complete list of additional deliverable options.

List of standard topo layers:

Major and Minor Contours (009)
Airworks
Layer
Name
G-TOPO-MAJR
G-TOPO-MINR
What’s included/
classified?
Graduating lines depicting changes in elevation.
How it’s
Drafted?
Polylines labeled along elevation at intervals as determined by the contour interval. Built from ground segmented point cloud.

We interpolate through obstructions over a short distance (i.e. under Vegetation).
Split Layer OptionNone
Example
Input data format.las
Input data
quality requirements
1’/5′ (minor/major)
RMSEz – 0.32′ min
GSD Source Imagery – 0.32′ min, 0.16′ recommended

2’/10′ (minor/major)
RMSEz – 0.65′ min
GSD Source Imagery – 0.65′ min, 0.32′ recommended
Obstruction (019)
Airworks
Layer
Name
A-OBSTRUCTION
What’s included/
classified?
Areas obstructing ground segmentation. All large “no data” regions in the ground classified point cloud.

Note: Water will return data but is removed from the ground classified point cloud.
How it’s
Drafted?
Closed polyline labeled at the outside edge of the ‘no data’ region in the ground classified point cloud. A radius of 5 pixels (more than 10×10 pixels wide) is shown on the layer.
Split Layer OptionNone
Example
Input data format.las
Input data
quality requirements
GSD Source Imagery
0.65′ min
0.32′ recommended