MapWinGeoProc:ClipLineSFWithPoly

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ClipLineSFWithPoly

Summary

ClipLines defines internal functions for clipping lines with polygons.

Functions

ClipLineSFWithMultiPartPolygon Clips all lines in the shapefile using a multi-part polygon.
ClipLineSFWithMultiPartPolygon Clips all lines in the shapefile using a multi-part polygon.
Fast_ClipLineSFWithPolygon Finds all portions of the lines that lie within the polygon and returns them in
the shapefile resultSF.
Fast_ClipLineSFWithPolygon All portions of lineSF within the polygon are found and saved in memory to resultLineSF.
Fast_ProcessPartInAndOutPoints Divides a line containing both inside and outside polygon points into multiple 2pt segments.
Calculates intersecetions and finds the portions of the line that are within the polygon.
Accurate_ClipLineSFWithPolygon Given a line shapefile and a polygon, this function will return only the
portions of the lines that lie within the polygon.
Accurate_ClipLineSFWithPolygon Given a line shapefile and a polygon, this function will find the
portions of each line that lies within the polygon and save it in memory to resultLineSF.
ProcessAllInsidePoints For lines where every point lies within the polygon, this function will
find if a 2pt segment crosses outside of the polygon and then adds only the
internal segments to the result file.
ProcessAllOutsidePoints For lines where every point lies outside the polygon, this function will
find if any 2pt segment crosses within the polygon and then adds the
internal segments to the result file.
ProcessPartInAndOutPoints For lines where part of the line lies within the polygon
and part of it lies outside, this function will save only
the inside portions and intersection points to the result shapefile.

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This page has been accessed 2,305 times. This page was last modified on 26 June 2006, at 03:14.