Take the 2-minute tour ×
Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It's 100% free, no registration required.

My question is in the same vein as this one.

I'm attempting to convert precipitation lines (Precipitación Media Anual) to a polygon for Mexico in QGIS using the Polygonizer plugin.

After running the Polygonizer using the New Method, it returns the polygon but with a table full of NULL values after clicking Copy table field from line layer, the same as this problem.

The Old Method crashes at around 19% completion.

Here's a few related questions to this problem:

Is clipping the lines to smaller sizes the easiest option?
extracting each line class, polygonize, and then union
Though I'm unfamiliar with GRASS, is there a way to easily do this?

EDIT: I'm going to see if GRASS or PostGIS will do the trick

I'm open to any other ways to do this.

Thanks again for all the help!

share|improve this question
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.