Split Polygons into half - batch or all at once preferably

[Jamie]

does anyone know of a tool that would take polygons and split them in
half (so you end up with 2 polygons with equal area). Ideally i want
to take 1000's of building polygons and make a new layer that has each
building chopped in half.

i have access to MapInfo 10 and ArcView 10 (+ Spatial Analyst)

i've done a fairly big search online and seen this question asked a
couple of times but no definitive answers.

The only viable options i've found so far are:
- a script for ArcView 3.1 (which i don't have access to and can't be
bought)
- the ET GeoTools extension for ArcView (the ETSplitPolygonByArea
tool) which does exactly what i want but you have to manually click to
split each individual polygon.

anyone got any ideas of how this might be achieved in MapInfo?

[Tony Pilkington]

http://www.griddle-gidata-analysis.com/page2.htm has a download to partition
a table of regions into equal-sized polygons.
The mesh option set to 2x1 will split a region into 2 vertically, 1x2
horizontally.
At high latitudes, it becomes unreliable due to the approximate method used
by MI to calculate areas.

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[Jamie]

Thanks again Tony exactly what i needed.

[Spencer Simpson]

This question really puzzled me, because it doesn't seem to have all the
necessary information.

Split a region in half... There are an infinite number of paths through a
region that will accomplish that. Even if you go for just a straight line.

If these are building polygons, do you want the path of splitting to be
oriented perpendicular to the road frontage?

Does splitting along the X or Y axis accomplish anything at all?

Spencer

[Jamie]

for my application i just needed both halves to have equal areas, the angle of the split wasn't important.

[Mohamed R. Arafa]

Hi Jamie,

I have the same need as you did. I tried this link http://www.griddle-gidata-analysis.com/page2.htm, but I do not know which tool to use.

Could you please advise which one to use?

 

Thanks,

Mohamed Arafa

[Tony Pilkington]

Look for subdivider.mbx, or go to MacTools.

----- Original Message -----

From: Mohamed R. Arafa

To: mapi...@googlegroups.com

Sent: Monday, October 15, 2012 12:19 PM

Subject: Re: [MI-L] Split Polygons into half - batch or all at once preferably

No virus found in this message.

Checked by AVG - www.avg.com

Version: 2013.0.2740 / Virus Database: 2601/5831 - Release Date: 10/14/12

[Jamie]

its right at the bottom of the page