A Map Sheet is a layer that covers a limited area. It can be created from image files, pdfs, MBTiles, or other CalTopo maps via the "print" function.
Supported file types include JPG, TIFF, or PDF files. Please be aware that if you are uploading a map sheet, the max file size is approximately 40 MB.
Map sheets act like layers, and can be viewed and stacked just like base layers in the map viewer. However, map sheets are more limited in geographical scope - think of them as 'local' layers.
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Shared Map Sheets are available to all users. These are part of CalTopo's database and available for all users to access. To contribute a map sheet to the shared database, see Submit a New Shared Map Sheet for Review.
Pro, Desktop, and Team Account users can upload and save their own map sheet data to their accounts.
All map sheets, regardless if they are shared or private, will be in the layers menu below the main base layer drop down menu. Clicking the + Add Map Sheet link will activate a new drop down menu where you can select from available map sheets.
Only map sheets that cover the current map viewer screen will show up in the drop down menu. If no map sheets appear in the list, you may need to zoom in, or move the map viewer to a new area. Publicly available map sheets will be grouped by type (Visitor, Bike, Water, etc).
Select a map sheet from the list to display it in the map viewer. Map sheets are displayed at 100% opacity by default.
Map sheets work in a similar way to base layers: you can change the opacity and stack multiple map sheets on the same map.
Map sheets include additional options next to the map sheet’s name. Click the Zoom to Extent icon to zoom the map view to fit that map sheet. Click the Crop icon to hide any extra blank area or text outside the map’s border.
To remove a map sheet from the map viewer, click the X next to the name of the map sheet in the Map Sheets menu.
Clicking the Info icon (represented with a question mark) will display a dialog with basic background information about the map sheet. If you are logged in, clicking Add to Account will save the map sheet to your account in the Map Sheets folder.
Any map sheets that are saved to your account will appear at the top of the map sheet list under Your Sheets the next time you view the area. You also have to save map sheets to your account on the web if you want to view and download them for offline use on the mobile app. Manage your account map sheets in Your Data.
To save a map sheet that you uploaded yourself, see Saving a Map Sheet to Your Account for Future Use.
Map sheets saved to your account can be viewed in the CalTopo mobile app and downloaded to your device for offline use. Shared map sheets cannot be viewed on mobile unless you first save them to your account on the web. See Map Sheets on Mobile for which map sheets are available, how to download them, and how to display them in the map viewer.