Project-GC Q&A - Recent questions tagged polygon

Is it possible to get DeLorme polygon waypoints?

Wed, 06 Aug 2025 01:49:03 +0000

Hi there! "Not all polygons are in the system", but are there any available to export? Specifically, I'd like the waypoints for DeLorme Challenges in AL, GA, and NC. Links below. Thanks for your time!

AL - https://project-gc.com/Challenges/GCTTNW/1116
GA - https://project-gc.com/Challenges/GCZ8XQ/1115
NC - https://project-gc.com/Challenges/GCTYE6/20733

Northern Ireland is not green on my maps anymore!?

Mon, 09 Nov 2015 08:56:06 +0000

I already cached in Ireland and the UK. Until a few weeks ago when I last checked my maps on my Statistic profile the complete island of Ireland and the UK were green.

But now Northern Ireland is suddenly white again. I didn't actually do a cache in the North of Ireland but before it belonged to the UK.

So I checked the profile of another cacher who did several caches in Ulster, Ireland and it is white on his map as well.

So I guess it might be a problem with some of the latest polygon updates?

Otherwise where do I have to log a cache to get this area green again?

If I find a cache in Belfast (Northern Ireland) will UK in europe map turn into green?

Fri, 24 Apr 2015 19:23:59 +0000

I'll visit Dublin (Ireland) soon and plan to travel to Belfast, just to turn the UK into green on the Europe Map. I'm unsure whether Ulster (Ireland) really does the job. Where can I check the polygons for a specific country use in project-gc. are they different from the ones use on geocaching.com?

New checker: Counts founds inside given polygon

Thu, 02 Apr 2015 11:38:40 +0000

I've made checker that counts founds or number of different cache types in given polygon or list of polygons.The polygon(s) is defined in config or in json database. You can create the polygon with google maps and extract it from the kml file.

The founds can be limited by allowed or disallowed types. The output can be personalized in config, like "logTitle": "I have found __nrfounds__ caches on peninsula of Bibione:"

the checker is here:

http://project-gc.com/Challenges/GC5BWFX/12702

How can I access the polygon data used in creating the maps on the profile stats to be used in a Challenge Checker?

Wed, 28 Jan 2015 12:06:42 +0000

For some countries (e.g., France) geocaching.com does not provide county data. Project-GC has used some open source polygon data to be able to assign caches in these countries to a county nontheless. Now, if I want to create a Challenge Checker to figure out whether a cache is within a county, can I access the polygon data stored somewhere on the Project-GC servers using the GetJsonData() function. I am aware that lillfiluren's script GenericPolyChecker (http://project-gc.com/Challenges/GC2M3D4/1320) can use server-side stored data, but I have no idea how the county polygons of a country are called.

function, that checks if a coord is inside an area / polygon given by an array / list of coords?

Fri, 28 Nov 2014 08:59:49 +0000

Writing a Checker, is there a function, that checks if a coord is inside an area / polygon given by an array / list of coords?

Check for discoveries in areas

Sun, 16 Nov 2014 12:26:13 +0000

I try to create a checker challenge.

I want to create zones. And the auditor would verify if there has at least one Found-it in each identifed areas.

Areas are polygons GPS coordinates.

Zone 1: polygon GPS points A, B, C and D.

Zone 2: polygon GPS points E, F, G, H and I.

Etc....

I need to create 25 areas.

Areas correspond to the parks and gardens of my city.

The challenge would be to have at least one found-it in each of the parks and gardens.

Can you help me create the auditor for that challenge ?

Thanks in advance ;-)

Regards