Re: [Qgis-user] shapefile render speed

Fri, 25 Jun 2010 16:28:51 -0700

Nicklas Avén wrote:
hallo

when you say that one of them is larger. what do you mean. do you mean larger extent, number of features or size of file.

what i wonder is if it could be that the fast one has less complex features with less vertexes per feature. the size of the actual .shp file can give a hint.

/nicklas

I mean it has a larger number of features(1700 in the smaller, 27000 in the larger).  Yes you are correct.  Just looking at the 2 files displayed on qgis they look almost the same so I wasn't thinking about the number of vertices per feature.  I think I found the difference.  I used the shape file utilities to get the information.  The file with fewer features has two big features one  >200000 and one > 12000000 vertices whereas the largest feature in the larger file only has 51000 vertices.

Thanks.
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