GARN TOPO
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Website Documentation
SAR
Save Map
Clear Map
Map Items
Saved Maps
Map Data
Configuration
Map Layers
Settings
Import File
Export Map
Print to PDF
Clear Cache
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Gear / Pack List
Team Members
Team Sync
Team Chat
Map Items
Saved Maps
Map Data

Map Layers

Base Layers
Brightness
0 – 100 50
Shaded Relief
0
Terrain
Topographic / Reference
Route Discovery
Conditions
Custom WMS / WMTS
Custom WFS
Your Data
Map Items

Add WMS/WMTS Source

Imagery Catalog

Add Map Item

Map Objects
Marker
A waypoint or point of interest
Line
A route or track
Polygon
A closed area shape
Buffer
Polygon within a given distance of a line
Range Ring
Circles at given radii from a point
Sector
Pie-slice area between two bearings
Bearing Line
Line at a given angle from a point
Record Track
Record your path via GPS
Photo Waypoint
Take a photo; drops a pin at your location
SAR Mode
Assignment – Line
SAR search assignment along a line
Assignment – Area
SAR search assignment polygon
Clue Marker
Mark a search clue or evidence
Op Period
Group assignments by operational period

Measure

Point
Point Info
Elevation, coordinate formats, declination
Line
Distance
Distance along a drawn line
Bearing
Bearing between two points
Elevation Profile
Elevation gain, loss and chart along a line
Polygon
Area
Area in acres and km²

Find

Point Info

–°, –°
Z4– ft / – m
N
Record Track
Marker at GPS
Add marker here
Start line here
Start polygon here
Point info
Measure from here
Center map here
Navigate to here
Copy coordinates

Edit Object

SAR Assignment Details
Probability of Detection (POD)

Settings

DISPLAY
Dark Mode
Show Labels
Show Crosshair
Default Mode
COORDINATES
Coordinate Format
Distance Units
Elevation Units
MAP BEHAVIOR
Show GPS Accuracy Circle
Blue ring showing GPS accuracy radius
Keep Screen On
Prevent screen sleep while tracking (mobile)
Snap-to-Trail Drawing
Snap lines to roads/trails when available
APPEARANCE
Label Size
Size of object name labels on the map
Default Object Color
TRACK RECORDING
Track Recording Detail
How often GPS records a point (Low=30s, Med=10s, High=5s, Highest=2.5s)
MAP SOURCES
Imported vector map style
Cartography used when you view an imported OpenMapTiles .pmtiles/.mbtiles vector map. Bundled offline styles (OSM Bright, Positron).
OFFLINE MAPS (.PMTILES / .MBTILES)
Download Offline Map…
Browse curated no-login map packages (Protomaps, BBBike, Geofabrik) or paste any direct .pmtiles / .mbtiles URL to fetch straight into your offline catalog.
Select Area on Map…
Draw a box on the map and drag its corners to frame any area, then download that exact region at the zoom levels you pick. Like Google Maps' offline selection.
Offline 3D Terrain
Saves Mapterhorn DEM tiles (z0–10) for the current view, or pick a preset region, so 3D mode works without internet. For 2D map tiles use Select Area on Map above.
Import .pmtiles / .mbtiles File
Already have an archive (Protomaps, OpenFreeMap, BBBike, tippecanoe, or any OpenMapTiles .mbtiles)? Load it directly — MBTiles are converted to PMTiles on import.
ONLINE TILE CACHE (FALLBACK)
Auto-Cache
Tiles you view while online are cached opportunistically. For reliable offline use, prefer importing a .pmtiles archive above.
Active
Download Current Layer
Pre-cache the current base map at all zoom levels for this viewport.
Cached Tile Storage
Tap Refresh to calculate
Clear Tile Cache
Frees storage — your map objects are not affected
DATA
Export GeoJSON
CalTopo-compatible (simplestyle: stroke / fill / marker-symbol)
Export GPX
GPX 1.1 with gpx_style colors — works with Gaia, Garmin, CalTopo
Export KML
KML 2.2 with colors & folders — opens in Google Earth, Gaia, CalTopo, ArcGIS
Import File
Load GeoJSON, GPX, KML / KMZ, or .gar
Clear All Map Data
Removes all saved objects, folders, and settings
ABOUT
Version
0.5.4 (Build 55)
Privacy Policy
garntopo.app/privacy ↗
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Download Offline Map

Download a region
Tap a continent, country, or mountain range and choose the zoom range — the current base map is saved as a real offline .pmtiles on your device. Works fully offline forever.
Ready-made packages
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Or grab a custom map package from a provider, then paste its direct .pmtiles or .mbtiles link below to download it straight into your offline catalog.
Get a package from
ProtomapsBuild a custom .pmtiles for any area GeofabrikRegional OpenStreetMap data downloads BBBike extractCustom-area extracts in many formats
Paste download URL
Tip: very large packages (multi-GB) are best downloaded in a browser, then loaded with Import on the previous screen — that streams to disk instead of holding the file in memory. Downloads require the host to allow cross-origin requests.
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Download Selected Area
Drag the box or pull its corners to frame the area, then choose zoom and download.
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Max zoom14