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+# gc_area
+
+Python3 scripts to filter geocaches bounded to a certain area.
+The area is an OpenStreetMap "relation" consisting of ways that make up the area.
+This OSM relation is then converted to a polygon.
+The polygon is then used to determine whether a geocache lies within the area or not.
+
+## Usage
+
+### Prerequisites
+
+1. Determine the OpenStreetMap relation ID. To do this, go to [openstreetmap.org](https://www.openstreetmap.org) and search for your area.
+2. Create a GPX file containing at least all geocaches in the area. You can do this by simply going to the Geocaching website, creating a filter and add filtered geocaches to a list. Then go to your lists page and download the GPX file for this list.
+3. Install the required Python3 packages:
+```cli
+pip install -r requirements.txt
+```
+
+### Using the Scripts
+
+1. Create the polygon describing your area (replace `<osm-relation-id>` with your ID):
+```cli
+$ python3 create_polygon.py <osm-relation-id>
+```
+For more options, see `python3 create_polygon.py --help`.
+
+2. Filter out any geocaches outside this area (replace <input-file> with your GPX file and <output-file> with desired result GPX file):
+```cli
+$ python3 gc_area.py <input-file> <output-file>
+```
+For more options, see `python3 gc_area.py --help`.
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