[API-users] Some geometry searches seem to not be working

[Jan Legind]

Hi Scott,

I know that we are using the left-hand rule to interpret polygons and the url you sent does not comply with this. The left-hand rule demands that when you travel along the polygon points, the area on the left-hand side of the direction you are travelling will be the inside of the shape. If you want a ring shape the inner polygon must comply with the right-hand rule.

This would be a nice feature to have for checking the validity of polygons. You can test the coordinate pairs here: http://geojsonlint.com/

Let me know if this helps.

Best,
Jan


From: API-users [mailto:api-users-bounces at lists.gbif.org] On Behalf Of Scott Chamberlain
Sent: 30 May 2018 18:25
To: api-users at lists.gbif.org
Subject: Re: [API-users] Some geometry searches seem to not be working

Any thoughts on this GBIF team?

Best, Scott
On Fri, May 18, 2018 at 8:53 AM Scott Chamberlain <myrmecocystus at gmail.com<mailto:myrmecocystus at gmail.com>> wrote:
Any thoughts from the GBIF team?

Best, Scott

On Tue, May 15, 2018 at 9:36 AM Scott Chamberlain <myrmecocystus at gmail.com<mailto:myrmecocystus at gmail.com>> wrote:
Another user of a package that uses rgbif reported I think the same problem https://github.com/ropensci/spocc/issues/187

Best, Scott

On Tue, May 15, 2018 at 7:54 AM Scott Chamberlain <myrmecocystus at gmail.com<mailto:myrmecocystus at gmail.com>> wrote:
Hi,

Users of rgbif have been reporting problems with geometry parameter in /occurrence route not working sometimes. It does indeed appear to work sometimes, but other times, it appears I think to be using latitude, but ignoring longitude. It's hard to give reproducible examples for command line or so, but here's a query where the longitude values appear to be all over the map, whereas latitude appear to be in the bounds.

https://api.gbif.org/v1/occurrence/search?limit=300&offset=0&geometry=POLYGON%28%28-0.1%2050.0%2C14.3%2050.0%2C14.3%2042.5%2C-0.1%2042.5%2C-0.1%2050.0%29%29&

using hasGeospatialIssue doesn't appear to help so I'm guessing there could be user error on my part or perhaps something going on with geometry WKT usage?

Best, Scott
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