8. Measurement
This section will give you insights into the measurements of generated images.
Once the orthomosaic images are generated, the user can use them in data or image processing. The area covered by the entire orthomosaic image is of great concern. These images are generated after the images are captured by the drones. The actual area on the land and the area of the image should not deviate. The user can verify it from the feature called 'Measurement' in DroneNaksha.
For using this facility, DroneNaksha gives us various tools such as:
  • Polygon
  • Polyline
  • Marker
These tools are available on the right drawer on the screen.
8.1 Polygon: The user can draw the polygon for the measurement of the area.
Polygon for Area Measurement
It shows the area and length of the area marked by the polygon. Also, labels are displayed if any. The user can see an area and length with four different unit styles such as sq. meters, hectares, etc. The user may untick the check boxes not to display that particular entity as shown in the picture. The user can rename the polygon for his reference. If many polygons are drawn in one map then it becomes easier to identify the specific polygon if it is renamed.
Polygon for Measurement of Area
8.2 Polyline:
The user can draw the polyline on the image to get the actual measurements of the area considered. It shows the area and length in sq. mtr, sq. km., acres, Hectares, as shown in image below:
Area Measurement with Polyline
The user may have the diagonal measurements of the map. The area calculated here is accurate and at actuals. Very few variations are observed in the actual area and area calculated by applying polygon or polyline.
The user is allowed to apply all the options available at the bottom of the screen to the selected polygon. The user may draw polygons inside the outer polygon. Selection and deselection of polygon, polyline, and marker are possible just by ticking and unticking the options on the right side of the screen.
8.3 Maker:
Marker Added
The user can place a marker on the map to check the latitude and longitude of the located points. You can rename the marker, and give the description to the particular marker. Select and deselect options are also available for selecting the specific marker. No restrictions on how many markers will be there.
The advantage of using a marker is that you can co-relate the latitude, and longitude of the with the marker of known position.
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