Data selection

There are 7 functions for the purchase by selection in the map window. These functions are located in the group “Selection functions”:

	Purchase of one export unit	Adds one export unit in the place of the click
	Purchase with line	Adds all export units crossed with specified line (terminated with a double click)
	Purchase with general polygon	Adds all export units inside the polygon (terminated with a double click) including the units crossed with the polygon
	Purchase with rectangle	Adds all export units inside the rectangle (specified with drag and drop) including the crossed with the rectangle
	Purchase by entering the number or name of the export unit	Adds all export units corresponding to the entered requests (asterisk as a placeholder can be used)
	Purchase with coordinates	Adds all export units inside the rectangle specified by a bounding box (format Ymax;Xmax;Ymin;Xmin with minus sign for S-JTSK datum)
	Selection with specification of spatial area	Adds all export units inside or on the boundary of selected spatial area

Selected export units are immediately displayed in the dialog “Your selection”. In case of non-digital product, the repeated selection is considered as an increase of number of items.

This function makes possible selection of export units with simple clicking into the export units map layout with overview map background. Moving the cursor over the map displays also a description informing about the name of export unit under the current position.

This function makes possible selection of export units with a polyline. All export units crossed with the line are selected (the function will be terminated with a double click).

This function makes possible definition of the area with a general polygon. The polygon will be defined by clicking in location of intended vertexes; definition of the polygon is terminated with a double click (the location of the double click is not considered as a vertex). The polygon must be OGIS specification conformant, i.e. the border line can’t cross itself. The defined polygon is transformed to the list of export units inside or at least crossed with the polygon.

This function makes possible purchase with a rectangle in the map. It will be defined by drag and drop in the map. Defined rectangle is transformed to the list of export units inside or at least crossed with it.

This function displays a dialogue frame for direct entering of export units by the list of their names. The names shall be entered without spaces and hyphens but separated by semicolons. “*” is allowed as a placeholder.

The function displays a dialogue frame for entering of coordinates of pair of points defining the requested area. The coordinates of the crop as YmaxXmax;YminXmin in the S-JTSK datum shall be entered. There is a template in the frame. Entered rectangle is transformed to the list of export units inside or at least crossed with it.

The function localises searched spatial elements in the map and also makes possible selection of products using spatial intersections. The first selection set contains elements that can be used for localisation or the purchase. The second one contains the list of values corresponding with selected element. In case that in the upper list is selected an element that contains limited number of elements, the second list is immediately filled in. Vice versa in case of selection of an element containing more values, the frame for entering of first characters is displayed instead of the second list. One of the buttons then:

The button “View in the map” localises selected/entered element in the map. The button “Add to the selection” transforms selected/entered element to the list of export units inside or at least crossed with the area. Using the link "Product information" se zobrazí detaily produktu.