Viewshed Analysis

perform a view shed analysis using loaded elevation grid data with a user-specified transmitter location, height, and radius. All areas within the selected radius that have a clear line of sight to the transmitter are colored with a user-specified color.

Generate Viewshed

Generate Viewshed A viewshed is the geographical area that is visible from a location. It includes all surrounding points that are in line-of-sight with that location and excludes points that are beyond the horizon or obstructed by terrain and other features (e.g., buildings, trees). Conversely, it can also refer to area from which an object can be seen.

Source Elevation Data*
Upload Elevation Data
Description*
Transmitter Elevation*
in Meters | specifies the height above ground or sea level for the transmitter that the view shed analysis will be simulating.
Height-Reference*
View Radius*
Please enter a number from .5 to 10000.
Minimum View Radius
Radius Units of Measure*
1 mile = 5,280 Feet | .5 mile =2,640 Feet | .25 Miles 1,320 feet | 25m =0.025km | 50m =0.05 KM | 100 M = 0.1 KM | 500M =0.5 KM
Output Format Type*
Select Output format for Viewshed
Output Vector Format*
Output Raster Format*
SPECIFY-LOCATION*
TRANSMITTER-TOWER (HOW ARE YOU SPECIFYING LOCATION) You can also use these sites: Lat Long Lookup1| Lat Long Lookup2| GeoJSON.IO
POINT-TOWER-TRANSMITTER*
Paste in a valid GeoJSON of your POINT SELECT LOCATION
LAT-Y*
LATITUDE COORDINATE (DECIMAL DEGREES) in Unprojected Geographic WGS84 (4326)
LONG-X*
LONGITUDE COORDINATE (DECIMAL DEGREES) in Unprojected Geographic WGS84 (4326)
Options
- Use a Transmission Angle from the Transmitter for Receiver Location
- Use a Transmission Angle Range to View where Beam hits Surface
- Ignore Earth Curvature
- Generate Area Features in Covered Areas
- Display Hidden Rather than Visible Areas
- Treat Missing Elevations as Ocean (Zero Elevation)
- Atmospheric Correction
- Use Vector Heights in Calculations
Only Select to Enable these Options as needed (Default NOT to Select)
Transmission Angle
Please enter a number from 0 to 360.
limit the view shed to a particular subsection of the complete radial area. This angle is a cartographic angle, meaning that 0 degrees is north and angle increases clockwise. This is Optional Parameter by Default full radius 360
SWEPT ANGLE*
Please enter a number from 0 to 360.
Atmospheric Correction Value
The atmospheric correction value is useful when determining the view shed for transmitting waves whose path is affected by the atmosphere. For example, when modeling microwave transmissions
Vector Dataset to use in Calcuations
Please paste in GeoJSON with Z Values applied to it. If you have a Shapefile, please convert it to GeoJSON first. This allows you to use things like buildings, fence lines, towers, etc. to block portions of the view, creating a more realistic view shed. The default is to not use vector data.
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