Remote sensing satellite and orthorectification of satellite imagery play an important role in geospatial mapping, image capture, and visualization that can create and provide Super GIS Mapping Services for many applications that require accurate and precise data. Images can have a strong visual impact and put spatial concepts into perspective when displaying or analyzing data.
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The
orthorectification process
- The accurate description of a sensor called a sensor model gives detailed information about the position and orientation of the sensor for each image and terrain model, for example, the World Elevation service available on ArcGIS Online.
- Many modern sensors include RPCs for geo rectification of satellite imagery with image transfer for this purpose.
- For collections of images with no associated RPC, it is often possible to create an RPC if you know a few properties about the orientation of the internal camera and the external environment. Automatic generation of tie points, DEMs, and ground control points can make the RPC orthorectification process very accurate.
How
does it work?
One
can generate the
orthorectification of satellite imagery from elevation
models (DEM) and aerial photographs. Elevations are generated from elevation
models (DEMs) and aerial images. Since the elevation model can be generated
from the same stereograph, the model cannot be generated from the same
stereograph, and no other data source is required. You will need another data
source for the purpose.
Requirements
for satellite imagery
·
Atmospheric and Radiometric Correction
·
Orthorectification and Alignment
·
Optimized for Cloud Computing
·
Configured for Localized Analysis
·
Fast Access and Direct Delivery
Orthorectification
and Alignment
Like
atmospheric and radiometric corrections, orthorectification of satellite imagery and
alignment is necessary to understand which features in the image are relevant.
Orthorectification ties pictures to their correct position on the earth and
controls the alignment between roads, buildings, and other elements in stacks
of photographs taken from different angles.
