The Chart Locker

for MBTiles

A free resource for cruising sailors
Download chart files in MBTile format for 
use with OpenCPN 5.x and other charting programs.

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Donate to save our oceans instead!

Good charts don't matter if we are navigating through dying oceans. All donations are sent to The Story of Stuff Project who are working hard to change behaviors and systems that create our dependency on plastic (and other stuff). 

US$905 donated as of August 2021... Thanks!

What are MBTile Files?

MBTile is a file format for storing tilesets. It's designed to allow many chart files to be packaged into a single tileset.

A tileset is a collection of raster or vector data broken up into a uniform grid of square tiles at 22 preset zoom levels.

MBTiles have many advantages over KAP files. They support more colors, are smaller than KAP files, and many tiles can be contained in a single file. 


Only share a link to this page that you are  now reading. That way others who want to download the files will do so knowing everything they need to know (and be able to read the warnings!). It will also give them a chance to donate to a great cause.

Thanks for helping out.


It’s up to you -- not these files or the people who made them -- to keep you, your crew, and your boat safe. We did our best with these files, but we make no promises.

Always use multiple sources when navigating -- including your eyes looking at the real world, not just a chartplotter.

‘Nuff said.

What's New?

- Interactive Chart Finder added.
- Central America, Pacific Coast: Aug 2021 - New charts added for Guatemala, El Salvador, Honduras, Nicaragua, Panama (including Canal).
- Mexico: Aug 2021 - All updated charts! Reduced number of charts for full coverage.
- Vanuatu: Aug 2021 - New charts added.
- Fiji: Aug 2021 - Updated charts that seamlessly cross 180th meridian.
- Bermuda: May 2021 - New charts added.
- Complete Log of Site Changes


These files have errors and do not display all possible dangers. Compare and use other chart sources. Don't be lazy. You are responsible for navigating your vessel safely.

The MBTile Chart Locker

Read HOW TO USE THESE FILES below, and view the

World map showing charted regions

Interactive Chart Finder

You can browse all the charts available using this map

Click the link in the Area column to download a ZIP file containing the MBTile charts for that area.

Please do not share file links... only share a link to this page.

Country/RegionArea# of ChartsZip File Size (bytes)Date CreatedDescription
(Use with along with the detailed charts below)
(9.6 MB)
August 2021San Diego to Guatemalan Border
including Islas Revillagigedo, Isla Guadalupe, & Rocas Alijos.
Z8 Z10 Navionics, BingSat & GoogleSat.
MEXICOOverview - Baja & Sea of Cortez
MEXICOMainland - Pacific Coast; North & South
(6.52 GB)
August 2021
North: Mazatlán to Zihuatanejo (includes Isla Isabela & Islas Marias)
South: Zihuatanejo to Guatemalan Border
Z12, Z15, Z18 Navionics, BingSat, & GoogleSat.
MEXICOBaja - Pacific Coast37,586,515,863 
(7.06 GB)
August 2021San Diego to Cabo San Lucas (includes Isla Guadalupe & Rocas Alijos).
Z12, Z15, Z18 Navionics, BingSat, & GoogleSat.
MEXICOSea of Cortez - Bing Satellite

Sea of Cortez - Google Satellite

Sea of Cortez - Navionics



(9.7 GB)
(4.4 GB)
(570 MB)

Dividing line between Northwest and Southwest is at Bahia Concepción.
Z12, Z15, Z18 Navionics, BingSat*, & GoogleSat.
*Bing Satellite tends to provide better images than Google Satellite in Mexico.


Islas Revillagigedo
(and Clipperton Island)
(121 MB)
August 2021Z8, Z10, Z12, Z15, Z18
Navionics, BingSat, & GoogleSat
 (No satellite images of Roca Partida).


Mexican Border to Columbian Border
(including Panama Canal, Cocos Island, & Islas de Las Perlas)
(8.1 GB)
August 2021
Z8, Z10, Z12, Z15, Z18
Navionics, BingSat, & GoogleSat


Please do not share file links... only share a link to this page.

Country/RegionArea# of ChartsSize (bytes)Date CreatedDescription
FRENCH POLYNESIAOverview35,920,787
(6 MB)
Dec 2019Z8 & Z10 Navionics, Bing Satellite,
& Google Satellite.
FRENCH POLYNESIAMarquesas6449,474,567
(450 MB)
Dec 2019Z8, Z10, Z12 Overview.
Z12, Z15, Z18 Navionics, Bing Satellite
& Google Satellite.
FRENCH POLYNESIATuamotus (incl Gambiers)123,696,409,159
(3.7 GB)
Dec 2019Z8, Z10, Z12 Overview.
Z15, 18 Navionics, Bing Satellite
& Google Satellite divided into
North, Middle, & South sections.
NOTE: Some atolls are only partially
displayed at Bing Satellite Z15/18
FRENCH POLYNESIASocieties61,149,110,561
(1.2 GB)
Dec 2019Z8, Z10, Z12 Overview.
Z15 & Z18 Navionics & Google Satellite.
Z14, Z15, Z18 Bing Satellite (Z14 is best
available for some islands).
FRENCH POLYNESIAAustrals696,999,954
(97 MB)
Dec 2019Z8, Z10, Z12 Overview.
Z15 & Z18 Navionics & Google Satellite.
Z14 Bing Satellite.


Please do not share file links... only share a link to this page.

Country/RegionArea# of ChartsSize (bytes)Date CreatedDescription
SOUTH PACIFICRapa Nui (Easter Island)3233,307,725
(233 MB)
Oct 2019Z8, Z10, Z12, Z15, Z18 Nautical,
Bing Satellite, & Google Satellite
SOUTH PACIFICPitcairn Islands688,762,048
(89 MB)
Nov 2019Z8, Z10, Z12 Overview.
Z15, Z18 All 4 islands  Nautical,
Bing Satellite, & Google Satellite
SOUTH PACIFICCook Islands6367,023
(358 MB)
Mar 2021Z8, Z10 Overview.
Z12, Z15, Z18 Nautical,
Bing Satellite, & Google Satellite
NOTE: Best Bing Sat resolution is
only Z14 on some islands.
SOUTH PACIFICTonga, Niue, and Minerva
& Beveridge Reefs
(2.05 GB)
Jan 2021Z8, Z10 Overview.
Z12, Z15, Z18 Nautical, Bing Satellite, & Google Satellite.
NOTE: No satellite charts for South Minerva and Beveridge Reefs.
SOUTH PACIFICTokelau3111,234
(108 MB)
Mar 2021Z8, Z10, Z12, Z15, Z18 Nautical,
Bing Satellite, & Google Satellite
SOUTH PACIFICSamoa & American Samoa31,916,693
(1.83 GB)
Mar 2021Z8, Z10, Z12, Z15, Z18 Nautical,
Bing Satellite, & Google Satellite
SOUTH PACIFICWallis & Fotuna3158,429
(155 MB)
Mar 2021Z8, Z10, Z12, Z15, Z18 Nautical,
Bing Satellite, & Google Satellite
SOUTH PACIFICFiji - Bing Satellite

Fiji - Google Satellite

Fiji - Nautical


(6.61 GB)
(643 MB)
August 2021Z8, Z10, Z12, Z15, Z18 
3( 4.69 GB)
Aug 2021Z8, Z10, Z12, Z15, Z18 Nautical, Bing Satellite, & Google Satellite

Please do not share file links... only share a link to this page.


Country/RegionArea# of ChartsSize (bytes)Date CreatedDescription
(405 KB)
May 2021Z8 & Z18 Nautical, Bing Satellite,
& Google Satellite.

Other Resources

Other files you may find useful

DescriptionFileDate CreatedCreated by
Rapa Nui Anchoring GuidePDF (788 KB)2008Bruce & Alene - s/v Migration
 South  Pacific Weather (Latitude 38)PDF (525 KB)2011Bruce & Alene - s/v Migration


56 minute video seminar on using MBTiles in OpenCPN.

  • OpenCPN Version  ::  OpenCPN 5.x is required to use MBTiles. They will not work in OpenCPN 4.x.
  • Folder Structure  ::  Create an organized folder structure  on your computer. Unzip, and copy files into folders. For example:
    C:/charts/Mexico_mbtiles /Mainland Pacific
    C:/charts/Mexico_mbtiles /Sea Of Cortez
  • Overviews  ::  Many areas have a separate overview. You should include these files when you use the more detailed files for an area; it will look better when using quilting.
  • Zoom levels  :: Overviews are Z8 & Z10, and occasionally Z12.
    Coastal and island charts are Z15 & Z18, and sometimes Z12. If a single mbtile covers an entire region, it may have Z8, 10, 12, 15, & 18 and there will be no overview. Some locations may not have all zoom levels. If that is the case, charts usually include the best zoom level available. For example, some Society Islands only have Z14 with Bing Satellite.
  • Type of Charts  ::  Each zip file contains separate folders containing mbtiles based on Bing or Google Satellite imagery and vector nautical charts. Remember, the mbtiles based on vector nautical charts ARE NO LONGER TRUE VECTOR CHARTS; they are raster mbtiles at various zoom levels. 
  • Load What You Need  ::  When "installing" charts in OpenCPN, you will find OpenCPN much more responsive if you only choose those folders with the charts you  currently need to use. For example, if you are sailing in Mexico, don't include charts for French Polynesia. 
  • Chart Groups  ::  We highly recommend reviewing OpenCPN's Chart Group documentation and using chart groups with MBTiles. For example, if you are sailing in the Sea of Cortez, create three groups: Nav,  BingSat, and GoogleSat. Put the Sea of Cortez Navionics charts in one group, the Sea of Cortez Bing satellite charts in another, and the Google satellite charts in another. Then you can easily switch back and forth between the type of chart you want to view. To switch chart groups, use the 1, 2, 3, etc. keys, or right-click and select Chart Groups. Again, read OpenCPN's Chart Group documentation. It's a cool feature; another proof that OpenCPN is the best charting program out there. Thanks OpenCPN Developers!
  • Folder Organization  ::  Feel free to reorganize your folder structure to allow easier and more logical creation of chart groups. 
  • Quilting  ::  Sometimes using these charts in OpenCPN works best with  Quilting turned off (Press the 'Q' key).  This is especially true if you are not limiting the active charts by using chart groups (which I do not recommend). Experiment to see what works best for you. This is really important: Clicking on a chart in the OpenCPN chartbar at the bottom of the screen excludes the chart when quilting is off, and selects the chart when quilting is on. Read that sentence again and make sure you understand it.
  • OpenCPN 5.0 Release Notes about MBTiles   ::  

    OpenCPN treats the MBTile format different from normal raster and vector charts. MBtiles are NOT fully capable and quiltable charts. They are used as switchable overlays. This is seen as the best compromise considering the unknowable zoom composition and accuracy of tilesets loaded from unknown sources. 

    MBTiles are shown as switchable overlays to whatever base chart sets are loaded. In the picture below, the background map is the base-map and the MBTiles is a satpic overlay. There are four charts in the chart-bar. All are MBTiles. Three are of a darker shade with a red "X". One is a lighter shade of violet and represents the visible satpic. Left click on a MBTiles piano key is a visibility toggle shortcut. Same effect as Right-click->"hide" on a piano key. Clicking on one of the darker shade buttons makes that MBTile chart visible. The button changes to a lighter shade and the red "X" disappears.

    With MBTiles it's advisable to show the charts outline - use the "O" shortcut key. If a chart is not visible, and there is no red "X" on the piano key, zoom in until it's visible. 

    MBTiles use the Web Mercator projection, with possible quite large errors in geo referencing. In real life these large errors are hard to find.
OpenCPN MBTile example
Red X over social media icons

Why No Social Media? No Patreon?

Because social media is harming society and cruising. The incessant monetizing of the cruising life detracts from its beauty and community. We appreciate the hundreds of people who helped us learn by simply giving freely of their time and experience.

Vloggers, stop trying to be famous and just sail already. And those who support them, there are so many more worthwhile causes. Really.

Migration anchored in North Minerva Reef

Charts and website created by Bruce Balan & Alene D. Rice of s/v Migration


Sorry, no OpenCPN support offered. However, if you find a problem with any of the charts (missed area, mislabeled file, etc.), or incorrect information on this website, we really want to know as we strive for accuracy.


thechartlocker at gmail

(We may be at sea and away from an internet connection so replies may be delayed.)

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