Online Mapping Guide
When viewing your maps online, you can use any device or browser.
When taking measurements it is best NOT to use a touch-enabled device
Most laptops have a touch screen and can be temporarily disabled in the Chrome Settings
Open Google Chrome
Type chrome://flags/ in the address bar and press Enter.
Click on Enable touch events > Disabled.
Click on Relaunch Now.
Using the Polygon Select Tool (second tool down), the user selects the perimeter of the are area for which they would like to make a volume measurement. This triggers a few different things behind the scenes.
First, elevation lookup images that were generated at the time of processing are downloaded. Then we determine a dynamic base surface within the defined polygon. Each pixel in our lookup image has a size of 4in x 4in. For each 4in x 4in sample we get the elevation and subtract off the dynamic base surface's height to give us that sample's volume. This is repeated for every sample that falls within the polygon and the sum of them is the "Calculated Volume".
The same process is repeated for the airspace in this volume or the "Void Volume" and is useful for measuring the air volume of a hole or pit. The "Void Volume" is measured downwards from the "Maximum Height". The sum of the "Calculated Volume" and the "Void Volume" is roughly equal to the "Area of Measurement" multiplied by the difference between the "Maximum Height" and the "Base Plane".
When you are drawing your polygon, imagine a stretched surface that goes between all those surface points. This is our dynamic base calculation. The volume that is present above this imaginary surface is counted as the volume. For the purposes of calculating the void volume, or volume of a pit, we use an imaginary plane at the highest selected polygon point and calculate the volume of air down to the ground surface. This is intended for drawing around the perimeter of a level surfaced pit.
Linear, area and volume measurements can be made directly in the browser using the embedded tools.
NOTE: These tools are not available on touch devices.
The main output for Code 3 Drone is the web map. Web maps enable a low bandwidth and low system resources view of what could potentially be a very large amount of data. It is not uncommon for a map that covers hundreds of acres at a high level of detail to come out to be a multi-Gigabyte file. Very few computers can view that file but almost everything can view the web map. We maps can have multiple layers. By default, we include an elevation layer to shows a colorized shaded-relief map that shows changes in elevation quite dramatically.
A low-resolution version of the created 3D model is also easily embeddable using the same controls for the 3D model.
Full resolution versions of the orthophoto map GeoTiff and various formats of the 3D model information are available for download.