Hi there
I'm using a cellular radio planning tool which outputs MIF files, which I
need to manipulate outside MapInfo. I have a MIF/MID format document from
the MapInfo website but it doesn't tell me how MapInfo knows whether or not
to fill overlapping regions. Can anyone help?
For example, if region A completely encloses region B then region B is
unfilled. But if region C intersects (but does not completely enclose)
region D then region C and region D are both filled. If I then add a region
E which completely encloses both C and D then C and D are holes, except for
the C/D overlap which is filled. It seems like changing the order of regions
in the MIF has no effect.
I've included a short MIF below to illustrate the problem. This can be
imported into MapInfo and viewed. Change the display settings in Layer
Control to see which regions are filled.
What I'd really like is a set of rules and/or an algorithm which would
determine which regions or parts of regions are filled.
Many thanks
-Mike Kennett
Horsham, UK
~~~~~~~~~
Version 300
Charset "WindowsLatin1"
Delimiter ","
CoordSys Earth Projection 8, 79, "m", -2, 49, 0.9996012717, 400000, -100000
Bounds (-7845061.1011, -15524202.1641) (8645061.1011, 4470074.53373)
Columns 1
Sector_Name Char(32)
Data
Region 5
5
200000 400000
200000 410000
210000 410000
210000 400000
200000 400000
5
203000 403000
203000 407000
207000 407000
207000 403000
203000 403000
5
202000 402000
202000 404000
204000 404000
204000 402000
202000 402000
5
209000 403000
209000 407000
213000 407000
213000 403000
209000 403000
5
203100 403100
203100 403500
203500 403500
203500 403100
203100 403100
Pen (1,2,0)
Brush (2,16777215,16777215)
Center 201500 405000
~~~~~~~~~~~~~
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