Cutting an IL by Selecting a Mask:
- activate on the "Control Panel" the category and/or IL that you want to cut;
- click on Tools - Cut Infolayer... on the main menu. The associated window is shown;
- select the operation Select Mask;
- click on IL.... and on the window "Categories and Planes"
select the category and the IL that contains the polygon with the limits you want to use and click on Execute;
- after selectiong an IL, an auxiliary screen is opened, where one must select the polygon(s) that will be used as mask on the cut. One can click on several polygons for multiple polygon selection. One click on an already selected polygon unmarks it. On the Cut Infolayer window there is the option to mark/unmark all the polygons of the IL;
- choose whether the cut will be executed on the Active IL or on all ILs of the active Category. On both cases, add a suffix to the name of the Active IL or the Category
(empty field before the category name), in order to create new ILs, otherwise the original ILs will be permanently modified;
- click on Execute
to perform the cut.
NOTE 1: The option Internal Cut generates an IL with the data contained on the mask; the option External Cut
generates an IL with the data that is not contained on the mask.
NOTE 2: The polygon of the limit IL must be adjusted and polygonized. It is not necessary for it to be associated to a class (if thematic), or to an object (if cadastral).
Cutting an IL from the Edition of a Mask:
- activate on the "Control panel" the category and/or IL you want to cut;
- click on Tools - Cut Infolayer... on the main menu. The associated window is presented;
- select the Edit option and the limit digitalization will be enabled;
- edit a closed line, similar to the available resource of vectorial edition. By default the Edition Mode is; STEP.
Clicking on the right button of the mouse, the last and the first points are automatically connected. On this version of SPRING, several limits can be edited as input;
- choose whether the cut will be executed on the Active IL or on all ILs of the active Category. In both cases, add a suffix to the name of the Active IL or the Category
(empty field before the name of the category), in order to create new ILs, otherwise the original IL will be permanently changed;
- click on Execute
to perform the cut.
NOTE: The edited Limit is not stored on any IL or memory after the cut. So, if you want to apply the same cut to other ILs, use one of the options available, i.e., Select
Mask and Bounding Rectangle.
Cutting an IL from the Bounding Rectangle:
- activate on the "Control Panel" the category and/or IL that you want to cut;
- click on Tools - Cut Infolayer... on the main menu. The associated window is presented;
- select the option Bounding Rectangle. Note that the button below is enabled;
- click on Bounding Rectangle.... and type on the associated window the coordinate values, planes or geographics, or with the SIM Cursor option enabled, use the area cursor to define the cutting rectangle and click on Execute. See more about using the window "Bounding Rectangle";
- choose whether the cut will be executed on the Active IL or on all ILs of the active Category. In both cases, add a suffix to the name of the Active IL or the Category
(empty field before the name of the category), in order to create new ILs, otherwise the original IL will be permanently changed;
- click on Execute
to perform the cut.
OBS: On this version of SPRING the cut on TIN representation is not performed.
Cut Infolayers : Concepts
This tool allows one to delimit or mask any infolayer (IL) of a project. To execute the cut, the user must define the limit to be cut. There are three ways to define the limit:
- Select Mask: from an IL that has any kind of polygon;
- Edit: can be digitalized on the screen as closed line (island);
- Bounding Rectangle: can be a bounding rectangle defined by the exact coordinates or by the area cursor.
The cut can be performed on:
- Active IL - can be applied to the active IL itself, changing it definitely, or create a new IL, from the same category;
- Active Category - The cut will be performed on all ILs of the current category. If a suffix is given for the ILs' names, different ILs will be created; otherwise all ILs will be definitely changed.
The cut can also be executed on any IL from any Category, with matrix or vectorial representation. For an irregular boundary, a city limit, for instance, the matrix IL will be filled all the way to its extreme black pixels (see image below) if it is a monocromatic image, otherwise, to its extreme white pixels.
BEFORE
AFTER
NOTE: If you perform a cut on the IL Image itself, the dimensions of the bounding rectangle will be the same, filling with black or white pixels until the rectangle limit. However, when a cut is performed resulting in a new IL, it will have a bounding rectangle with the dimension of the cut limit itself.
If the IL to be cut is vectorial, with the topology of polygons, for instance, the limit line will be part of the cut IL, keeping the identification of the polygons, be it cadastral (object map) or thematic. The image below shows a cut Thematic IL.
BEFORE
AFTER