Download USER MANUAL

PHOTOMOD 5.21
GeoMosaic
1. About
The current User Manual contains information about information of Geomosaic program
functionality. This program is designed to merge the georeferenced orthorectified imagery
and create the orthomosaic from them. The main part of document contains description
the technology of mosaic creation.
2. About program
2.1. Purpose and main definitions
The GeoMosaic program (hereinafter is referred to as “program”) is purposed to create
the orthomosaic from georeferenced orthorectified aerial and satellite imagery, splitting
of created orthomosaic with the capable of saving sheets in popular raster file formats.
The orthoimage is the image, obtained after the transformation from the central projection to
the orthogonal projection with automatic removal of distortions, which were caused by the imaging
equipment, elevation angle and relief.
The orthomosaic is the single image, which obtained during the brightness adjustment and
merging the multiple georeferenced orthorectified images.
The program uses the following conventions and terms:
• Throughout this User Manual, the source geoereferenced orthoimage is referred to
as “mosaic project image” or “source image”.
• Throughout this User Manual, the orthomosaic, created from the source images, is
referred to as “output mosaic” or “mosaic”.
• Throughout this User Manual, the cutline is the boundaries of the specified area from
the source image, which will be included in the output mosaic. The vector polygons
are used for the cutlines creation. The common boundaries of neighbouring cutlines
are completely topologically coincide, i.e. the areas of source images, selected using
the cutlines, which are the single area without overlaps and “holes”.
• Throughout this User Manual, the sheet is the output mosaic area, which is saved in
the separate output format file. The vector polygons are used for creation of sheet
boundaries.
2.2. Features at a Glance
The program provides the following features:
• The cutlines creation in automatic mode to define the area of the source images,
which were be included in the output mosaic;
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