| Environments | PYTHON :: EASI :: MODELER |
| Batch Mode | Yes |
| Quick links | Description :: Parameters :: Parameter descriptions :: Details :: Related |
| Back to top |
| Back to top |
| Name | Type | Length | Value range |
|---|---|---|---|
| Input: Input elevation channel* | Raster port | 1 - 1 | |
| Output: Output raster channel* | Raster port | 1 - 1 | |
| X View Point* | Float | 1 - 1 | |
| Y View Point* | Float | 1 - 1 | |
| Z View Point* | Float | 1 - 1 | |
| Radius from DEM View Point | Float | 0 - 1 | 0.0 - |
| Back to top |
Input: Input elevation channel
Specifies the input channel that contains the elevation data (DEM).
Output: Output raster channel
Specifies the channel to receive the visibile pixels.
X View Point
Specifies the horizontal direction (X) of the viewpoint in geocoded coordinates.
Y View Point
Specifies the vertical direction (Y) of the viewpoint in geocoded coordinates.
Z View Point
Specifies the elevation (Z) of the viewpoint in above the surface at the geocoded coordinate.
If the viewpoint is off the image, the elevation will be taken as absolute, rather than relative to the surface, because the surface cannot be sampled.
Radius from DEM View Point
Specifies the radius of the seen area search, in image georeferenced units (usually meters).
If this parameter is not specified, the entire image is searched by default.
| Back to top |
SEENARE determines which pixels in an elevation channel of an input image can be seen from a user-defined view point. The results are saved to the specified output channel. Pixels that can be seen from the given view point are represented by 1; pixels that cannot be seen are represented by 0.
The following parameters are required in SEENARE.
The input file (FILE) contains the input DEM channel (DBEC) and the output channel (DBOC). The input file must be a geocoded image.
The input DEM view point geocoded coordinates and elevation are specified using the X, Y, and Z View Point parameters.
The RADIUS (Radius from View Point) parameter allows you to set the radius of the seen area search. If this parameter is not specified, the entire image is analyzed.
SEENARE stores the entire DEM in memory. For example:
a 1000x1000 16-bit signed DEM requires 1000x1000x2 = 2000000 Bytes. a 1000x1000 32-bit real DEM requires 1000x1000x4 = 4000000 Bytes. a 6000x6000 16-bit signed DEM requires 6000x6000x2 = 72000000 Bytes a 6000x6000 32-bit real DEM requires 6000x6000x4 =144000000 Bytes.
Ensure that your system has sufficient available memory before running SEENARE.
© PCI Geomatics Enterprises, Inc.®, 2024. All rights reserved.