Rasters report

Created digital orthophotomaps onto a separate nomenclature sheet often are located on several pictures. Technology creations of an orthophotomap allows to create a united raster onto this sheet. At the first stage the separate photos are transformed. As a result on a place of a joint of these photos a shift of the image is usually formed that worsens photometric properties of the created photoplan. For minimization of received shift the task of a report of rasters, is used, processing the rasters received at the first stage - this is a second stage of technology. Accuracy of creation of the photoplan thus does not worsen.

Some definitions:

- Current raster - active at present a raster with which we carry out the certain actions under the report (we can measure the connecting points on it or transform it).

- Neibour rasters - the rasters having the common area with the current raster.

- Border of rasters - common area of the current and neibour rasters.

- Connecting points- a point displayed not less than on two rasters.

- Unique number of raster - unique number of raster in region since 1 (for example, number of a picture or a part of a picture number), is set by the editor of region, is used for formation of number of the connecting points.

The scheme of process of the report is such. On all rasters of region we serially make every possible rasters pairs. Thus one raster is current one, another is neibour. For this rasters pair we measure the connecting points on the current raster. We change the status of rasters, i.e. the neibour raster becomes current, and the current raster becomes neibour. Again we measure the connecting points on the current raster for this rasters pair. Thus, the border of rasters will be measured as though from two sides. We choose the next pair of rasters and measure the connecting points from two sides. And so on for all rasters pairs of region. Measurements of the connecting points we carry out on rasters, already transformed earlier as single.

Upon termination of measurements process of the connecting points we serially carry out repeated transformation of region  rasters in one of two modes: photo or conformal (by Delone).

Upon termination of repeated transformation we receive the reported rasters.

If results of the report do not satisfy, it is necessary to execute measurements of additional number of connecting points under the same scheme and once again to execute transformation.

The report of rasters is carried out by photocon.dll module, which is called through Run Application item of Tools menu. Start of task.