Map grid creation |
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The task is intended for creation of map grid for electronic topographic maps of scale from 1 : 10000 up to 1 : 1000000 and for geographic maps of scale from 1 : 500000 till 1:10 000000. At map grid creation for topographical maps it is necessary that all sheets of region belonged to one six-degrees zone. For creation of a rectangular (kilometer) grid it is necessary to choose Horizontal/vertical lines mode, for a cartographical grid one of modes: Grid ticks of parallels/meridians and (or) the Central cross. For scale more 1 : 500000, the rectangular grid is created in Horizontal/vertical ticks, cartographical - in modes: Parallels/meridians and (or) Dashes of parallels/meridians. Point of crossing of coordinates grid mode is intended for creation of point objects on crossing of coordinates lines. A code of created objects the user should specify in Parameters dialogue. Code of semantics and numerical value can be not specified. By Parameters buttons the dialogs «Parameters of rectangular coordinates grid» and «Parameters of geographic coordinates grid» are called . In these dialogs there are displayed the standard parameters for creation of a mathematical basis which the user can change. Press OK button to start process of map grid creation. It is possible to interrupt process of drawing of map grid, having pressed Cancel button. In a case when created elements already are on a map, the task interpellates about replacement. At the positive answer the existing objects will be deleted and new objects will be created. Transactions mode allowes / forbids processing of transactions. If mode is switched off, then the creation speed increases, but there is no opportunity of cancellation of all created objects. Standard parameters of mathematical elements are mentioned below according to scale.
Topographic maps: Mathematical elements for maps of scale 1 : 10000 Mathematical elements for maps of scale 1 : 25000 Mathematical elements for maps of scale 1 : 50000, 1 : 100000 Mathematical elements for maps of scale 1 : 200000 Mathematical elements for maps of scale 1 : 500000 Mathematical elements for maps of scale 1 : 1000000 Geographic maps: Mathematical elements for maps of scale 1 : 500000 Mathematical elements for maps of scale 1 : 1000000 Mathematical elements for maps of scale 1 : 2500000 Mathematical elements for maps of scale 1 : 5000000 Mathematical elements for maps of scale 1 : 10000000
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