<div dir="ltr">Thanks for that, Jukka, and sorry for the vagueness of my original post... I was under a very tight deadline to finish something on Thursday before being away for a long weekend.<div><br></div><div>I got the same result as you without the -lco option. The output file just contained the same MULTIPOLYGONS, although the file was not identical (I presume due to precision of some of the numbers).</div><div><br></div><div>Adding that option, however, still doesn't create a third column, at least not with my file, which I also neglected to say is very wide (hundreds of thousands of small POLYGONs in each MULTIPOLYGON).</div><div><br></div><div>The file is private data, so I can't post it, I'm afraid.</div><div><br></div><div>In the end, I wrote a script to just read in the file as text and chop up the lines, basically splitting on ")),((".</div><div><br></div><div>I'll have a play with geopandas too.</div><div><br></div><div>SE</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Oct 11, 2019 at 6:09 AM jratike80 <<a href="mailto:jukka.rahkonen@maanmittauslaitos.fi">jukka.rahkonen@maanmittauslaitos.fi</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Here is a partial solution or workaround<br>
<br>
Take this as input<br>
<br>
id,wkt<br>
1,"MULTIPOLYGON ((( 296 643, 623 660, 531 484, 349 507, 296 643 )), (( 681<br>
635, 895 588, 632 432, 681 635 )))"<br>
<br>
Run this <br>
ogr2ogr -f csv -lco geometry=as_wkt -explodecollections wkt_expl.csv wkt.csv<br>
<br>
Get this result<br>
<br>
WKT,id,wkt<br>
"POLYGON ((296 643,623 660,531 484,349 507,296 643))","1","MULTIPOLYGON (((<br>
296 643, 623 660, 531 484, 349 507, 296 643 )), (( 681 635, 895 588, 632<br>
432, 681 635 )))"<br>
"POLYGON ((681 635,895 588,632 432,681 635))","1","MULTIPOLYGON ((( 296 643,<br>
623 660, 531 484, 349 507, 296 643 )), (( 681 635, 895 588, 632 432, 681 635<br>
)))"<br>
<br>
So, the original multigeometry is included in both lines but an additional<br>
WKT columns contains the exploded polygons. Without -lco geometry=as_wkt<br>
just the the multipolygon geometry is written into both lines.<br>
<br>
id,wkt<br>
"1","MULTIPOLYGON ((( 296 643, 623 660, 531 484, 349 507, 296 643 )), (( 681<br>
635, 895 588, 632 432, 681 635 )))"<br>
"1","MULTIPOLYGON ((( 296 643, 623 660, 531 484, 349 507, 296 643 )), (( 681<br>
635, 895 588, 632 432, 681 635 )))"<br>
<br>
<br>
So something happened but not exactly what I would have guessed. Use case is<br>
a bit special but perhaps this is buggy behavior.<br>
<br>
-Jukka Rahkonen-<br>
<br>
<br>
<br>
jratike80 wrote<br>
> Hi,<br>
> <br>
> Please provide some test data and explain in details what did you try.<br>
> Spending some time for making an answerable question would certainly be<br>
> the<br>
> best way for getting fast and usable help.<br>
> <br>
> -Jukka Rahkonen-<br>
<br>
<br>
<br>
<br>
<br>
--<br>
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