ZYRN TOPO
Offline-first topo maps
Starting…
ZYRN TOPO SAR
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Map
Save Map
Clear Map
Map Items
Saved Maps
Map Data
Tools
Measure
Point Info
Download Map Area
Print to PDF
Gear / Pack List
Configuration
Map Layers
Settings
Import Map
Export Map
Clear Cache
Team
Team Members
Team Sync
Team Chat
Website Documentation
Map Items
Saved Maps
Map Data

Map Layers

Base Layers
Active Layers top = front
Brightness
0 – 100 50
Shaded Relief
0
Custom WMS / WMTS
Custom WFS
Your Data
Map Items

Add WMS/WMTS Source

Imagery Catalog

Tools

Measure

Search

Point Info

–°, –°
Z4– ft / – m
—
Weather
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)

Print / Export

Drag the title bar down to see & position the map area
Sheet
Paper size
Orientation
Scale
Map scale
Custom 1:
Resolution
Output DPI
Grid & coordinates
Grid system
Grid colour
Marginalia
Title block text
Map title
Prepared by

Settings

Customize your experience
DISPLAY
Theme
Night Map
Dim or red-light the map for night use (doesn't change the app theme)
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
Display style only for imported vector .pmtiles/.mbtiles maps. Prefer the archive's own style when present; fallback choices never convert, overwrite, or change the archive.
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.
Offline 3D Terrain
Saves Mapterhorn DEM tiles (z0–10) for the current view, or pick a preset region, so 3D terrain is available offline once saved. 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
Simplestyle GeoJSON (stroke / fill / marker-symbol)
Export GPX
GPX 1.1 with gpx_style colors — works with most GPS apps & devices
Export KML
KML 2.2 with colors & folders — opens in Google Earth & other GIS tools
Import File
Load GeoJSON, GPX, KML / KMZ, or .zyrn
Clear All Map Data
Removes all saved objects, folders, and settings
ABOUT
Version
0.8.0 (Build 80)
Privacy Policy
zyrntopo.app/privacy ↗
Gear / Pack List
0 items 0 oz (0 lb)
Team Members
0 members
Team Sync
Not connected
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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. Available offline once saved.
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.
Team Chat
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Map tiles not cached for this area
Download Selected Area
Drag the box or pull its corners to frame the area, then choose zoom and download.
Min zoom0
Max zoom14