Map calibration
At present a large quantity of the scanned topographic maps can be downloaded from the Internet. Unfortunately, the significant part of these maps is not calibrated - i.e., it does not contain information about the position of sheet on the coordinate grid. OziExplorer allows calibrate maps manually, however, it is necessary to understand the essence of the question. Otherwise the difference in the coordinates on the map and the locality can reach hundreds of the meters.
First of all, user have to set parameters of map projection (central meredian, scale factor, false easting and northing). Furthermore, calibration requires accuracy and certain time. Registered version of OziExplorer supports up to 9-points calibration (the more points - the more accuracy). So, calibrating the map, user have to determine ccodinates of up to 9 points. Any error or misprint here lead to unusable map.
MapList substantially simplifies and accelerates this process. In fact, no special knoledge is nessessary. Parsing name of file, MapList determines scale and position of the sheet and create map file. Of course, the calibration points will not exactly fall into the map corners, however, after loading map into OziExplorer, it is possible to rapidly move its into the necessary place. Thus, it is not necessary any more to input coordinates of the calibration points and parameters of map projection.
Current version supports both automatic filename parsing and manual input of scale and sheet number. To use automatic parsing, be sure what file names correspond to masks shown here.
Attention! Maps must be created in Pulkovo-1942 map datum. Map projection must be Transverse Mercator (UTM) with parameters:
| Zone width | 6° |
| Scale factor | 1,0000 |
| False Easting | 500 000 m |
| False Northing (northern hemisphere) | 0 m |
| False Northing (south hemisphere) | 10 000 000 m |