Le filtrage des caches peut être appliqué à différents endroits dans c:geo, par exemple sur la carte, dans listes ou lors de l'exécution d'une recherche. À tous ces endroits, le même mécanisme de filtrage est utilisé.

Les paramètres des filtres sont accessibles via le menu des options en cliquant sur l'icône du filtre .

Si un filtre est déjà actif, il est affiché sous la forme d'une ligne d'en-tête sous la barre de titre. En appuyant sur cette ligne d'en-tête, vous pouvez également accéder aux paramètres du filtre. Par exemple, la capture d'écran suivante montre à la fois l'icône du filtre et la ligne d'en-tête du filtre (entourée en rouge) où le filtre actuel est réglé pour ne montrer que les caches de type “Traditionnel”.

Une long appui sur cette indication ouvrira une liste des filtres enregistrés pour changer le filtre actif.

Le filtrage de base permet de filtrer par type de cache, difficulté et terrain :

Le tableau suivant décrit les fonctions des filtres :

Icône	Fonction	Description
	Appliquer	Ferme la boîte de dialogue et applique les paramètres de filtre actuels aux caches.
	Annuler	Ferme la boîte de dialogue et abandonne les modifications du filtre.
	Effacer	Efface le filtre actuel, c'est-à-dire le place dans un état où il ne filtre rien (tous les types de cache sont cochés, toutes les difficultés/les valeurs de terrain sont sélectionnées).
	changer de mode	Passe du mode de base au mode de filtrage avancé.

Le reste de l'écran est divisé en différentes sections. Vous pouvez définir des critères de filtrage dans plus d'une de ces sections. Dans ce cas, ils seront combinés en utilisant la logique ET. Par exemple, si vous définissez Type de cache sur Traditionnel et Difficulté sur 1.0-3.0, vous ne filtrerez que les caches qui sont à la fois de type Traditionnel et qui ont une Difficulté ≤ 3.0.

Filter by cache type. Use checkboxes to mark/unmark the cache types you want to include in the result list. Use Select all checkbox to quickly mark/unmark all cache types.

c:geo supports over 20 cache types from across many geocaching services. Thus, to easify filter dialog, some selectable cache types will group other cache types. This logic was copied as closely as possible from geocaching.com behavior:

Icon	Cache Type Filter	Filters the following cache types
	Tradi	Traditional Cache, Geocaching HQ, Project APE Cache
	Event	Event Cache, Mega-Event Cache, Giga-Event Cache, Community Celebration Event, Geocaching HQ Celebration, GPS Adventures Exhibit,Geocaching HQ Block Party
	Virtual	Virtual Cache, Locationless (Reverse) Cache

Filter by Difficulty or Terrain. Use the respective sliders to select a range of values to filter caches for. Filtering will be done inclusive, e.g. setting the slider to 1.5-3.0 will include e.g. caches with Difficulty 1.5 in the result, but not those with Difficulty = 1.0.

Note that setting the filter to the whole range (1.0-5.0) will also include caches in the result which don't have a Difficulty / Terrain at all (like e.g. user-defined caches).

Allows to filter by the current state of a cache. You can select whether to filter out caches by their state. This filter is also available with more options in the advanced mode.

To include/exclude caches in states Active, Disabled or Archived, mark/unmark the respective chips at the top of the filter.

The other status options all allow you to set one of three values for it:

The following status filters are available (Description says what is filtered if you choose Yes):

To use advanced filter functions, turn on the Basic/Advanced mode switch. This will change the layout of the filter dialog to something like this:

In Advanced mode several things are added to the filter function which are described in the following section.

In Basic mode, the available filter criteria are fixed to exactly Cache Type, Difficulty and Terrain as well as a basic status filter. In Advanced mode you may freely add or delete filter criteria to build up you own personal filter. You may even add the same filter criteria multiple times, e.g. to create a filter containing multiple text pieces in the cache name.

To add a filter criteria, tap the button Add filter criteria in the upper right. A dialog will open listing all available filter criterias:

Choosing one of the criteria will add the respective filter to the criteria list. All criteria are explained here.

To remove a filter criteria, tap the trash icon in its upper right corner.

To change the order of filter criteria in the list, tap&drag the drag icon in its upper right corner.

Filter expressions may be freely saved and loaded using a user-defined name.

To save a filter, use the “save” icon . A dialog will pop up the enter a name for the filter:

To load or delete an existing filter, use the “Modify” icon . A dialog will pop up with all existing filters, allowing you to select one and either load or delete it using the respective buttons:

Additional filter options are available in advanced mode:

The following table lists all available filter criteria. Those criteria can be used to build up arbitrary complex filters in Advanced mode. In follow-up sections, some filter criteria are explained in more detail.

Text filters filter for a text in a specific field of the cache data, e.g. Name or Description. They all work the same way and are explained here using Cache Name as an example.

The type of text filtering can be selected by tapping the Text filter type button which initially shows the value Contains. The text type together with the text value entered in field Search Text determines which caches are filtered.

Use the Match case checkbox to decide whether text matching should occur case-sensitive or not.

Date filters filter for a date in a specific date field of the cache data, e.g. the hidden date. They all work the same way and are explained here using Hidden Date as an example.

This type of filter let's you search for a From - To Date range, where both From and To can optionally be empty. Tap on the respective buttons next to the From / To label to set a date. In the date picker dialog, you may choose the button Clear to clear the date.

The status filter filters for various cache status values and looks like this:

To include/exclude caches in states Active, Disabled or Archived, mark/unmark the respective chips at the top of the filter.

The other status options all allow you to set one of three values for it:

The following status filters are available (Description says what is filtered if you choose Yes):

The attributes filter filters for various cache attributes values and looks like this:

Check multiple cache attributes to filter caches which have all of the selected attributes attached to them. Note that geocaching.com also supports negative attribute assignment, tap attribute symbol again to select it's negative version.

Perform a long tap on an icon to see its meaning as a tool tip text.

Use Include / Exclude toggle to filter for caches either including or excluding all of the selected attributes.

use the Clear button in the upper right to deselect all cache attributes quickly.

The size filter filters for cache sizes such as Regular, Small and Micro), and looks like this:

Mark all size chips where you want to filter caches for. Use the special Select all chip to quickly mark or unmark all available size options.

The favorites filter filters for favorite points assigned to a cache, and looks like this:

Use the Absolute / Percentage toggle to choose whether to filter for absolute favorite point count or for percentage of favorited logs in comparison with all found logs. Note that the scale of the slider below will change/reset if you toggle this value.

In Absolute mode, select on the scale the range of favorite points you want to filter. Selecting the very right point of the scale will result in filtering all caches with > 1000 favorite points.

In Percentage mode, use the scale to select a percentage range between 0% and 100% to filter.

The log entry filter filters caches based on their log entries, and looks like this:

You may choose to filter caches with a log entry:

• by a specific user (e.g. EddieMuc), or
• containing a specific text (e.g. TFTC)

Use Include / Exclude toggle to filter for caches either having or not having a log entry satisfying the selected criterias.

The logs count filter filters caches based on their logs count, and looks like this:

Tap on the Log Count Type combo box (initially set to Found It) to select the type of log for whose count you want to filter. Select one of Found it, Didn't find it or All logs.

In the slider below, select the range of logs count you want to filter caches for. Selecting the very right point of the slider will result in filtering all caches with > 1000 logs of the specified type.

The distance filter filters caches based on their distance from a certain point, and looks like this:

• Mark the Use current position checkbox to base the distance calculation on your current GPS position
• Enter a valid WGS84-coordinate in the text field to use it as the base for the distance calculation.
• Use the slider below to select the min and max distance (in kilometers/miles) of caches within the base coordinate to include in the filter result.

Dynamic Checkboxlist filters filters for one or multiple value from a more dynamic list. Example filters using this are Origin and Stored List filter:

Mark the items on the list you want to see in the result list. Use the Add more items button to see more items to add.