Download MaDCAT manual

DELETE POLYGONS:
(Actions tree: DRAWING BY POLYGONS CURRENT LAYER - Delete polygons)
Delete the selected polygons.
Delete the selected polygons. Click on the Delete Polygons tool and then click on the polygon to be deleted.
The operation cannot be Undone.
DELETE ALL POLYGONS:
(Actions tree: DRAWING BY POLYGONS CURRENT LAYER - Delete all polygons)
Delete all polygons of current layer.
ELIMINATE SMALL POLYGONS..:
(Actions tree: DRAWING BY POLYGONS CURRENT LAYER - Eliminate small polygons..)
Delete polygons with area less than a specified value. The small polygon become part of the nearest one.
Delete polygons with area less than a specified value. The small polygons become part of the nearest one.
Click on the Eliminate Small Polygons button. Type in the value – MadCat will eliminate all polygons with an
area smaller than the one you specify. MadCat uses the map units of your data. Make sure then that your
data is in metres.
After the task is complete, MadCat will tell you how many polygons were deleted and there fore below the
specified area tolerance.
DISSOLVE POLYGONS...:
(Actions tree: DRAWING BY POLYGONS CURRENT LAYER - Dissolve polygons...)
If current theme contains selected polygons, all selected polygons will be merged together.
If no polygon is selected, the application shows a specific window to define dissolving criteria.
Dissolve adjacent polygons, specifying joining criteria. If polygons with the same code are adjacent to each
other, they will be dissolved to form one polygon. This helps reduce the size of the dataset and is useful
when aggregating data. Click the Dissolve tool and mark the dissolve criteria in the dialog box that appears.
MadCat will the process and will notify you on the progress of the operation.
BEFORE
DISSOLVE
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