Avenza Resources Blog
In the latest release of QGIS, it's possible to export maps from the Print Composer that is compatible with the Avenza Maps app. The Print Composer tool in QGIS is used for creating map layouts. In previous QGIS versions, it would export maps without spatial reference information meaning maps would need to be georeferenced post export to be compatible with Avenza Maps. As of version 2.16, it's possible to export files with an embedded spatial reference. QGIS can export the following formats that can be read by the Avenza Maps app:
There are two methods of exporting GPS tracks from Avenza Maps in KML format: as a line and as a track. Which option to select depends on the intended purpose. Lines are much simpler than tracks and store only the position of each vertex in the line as latitude longitude and elevation. Tracks contain a complete description of how the path moves through space including the position at one-second intervals, the time at which each position was recorded, the compass angle of the heading, and the velocity. Lines take up much less storage space than tracks. To switch between exporting to Lines or Tracks, select Track Export in the Export Settings screen.
Avenza Maps Pro users can export layers to shapefile with associated photos. ArcGIS can display these photos using either hyperlinks or HTML popups. This post explains how to export your photos from Avenza Maps and display them in ArcGIS.
First, download and unzip these utilities. The general process for exporting and displaying photos is as follows:
- Export a shapefile with photos from Avenza Maps
- Unzip the exported files to your computer
- Open ArcGIS
- Add the shapefile to the map
- Save the map in the same folder as the shapefile
- Run the “Photo Shapefile Converter” tool
- Set the layer to display a hyperlinked photo and/or
- Set the layer to show an HTML popup
MAPublisher Grids and Graticules is a powerful tool. There are dozens of settings to create an indexed grid, measured grid, or graticule exactly the way you want. We often receive questions about how to create certain grid and graticule styles and this was interesting. We were asked how to create a graticule to display a very specific latitude and longitude, perhaps even by itself (only a single line of latitude or longitude).
A graticule is the network of lines of latitude and longitude drawn at regular intervals on a map. Graticules are created in MAPublisher using the Grids and Graticules tool. In some maps, you may want to limit the area on the map that a graticule covers. For example, you may want it to cover only the map’s area of interest. The image below is a map of North America with a graticule drawn at 5-degree intervals. US State boundaries are drawn in white. In this post, we'll modify the graticule three times so it conforms to the edges of the image, so it covers only the Continental United States, and lastly a combination of the previous two modifications.
When georeferencing a map in Geographic Imager, there are two tools which can be used to check spatial accuracy: Validate and Show Image Extents Online. With Validate, click a point on the image and it will show the corresponding location on the web map service so that you can compare the difference between them. Show Image Extents Online will display a rectangle representing the spatial extent of the image on the web map.
If you launch Adobe Photoshop and then realize that extensions didn't load properly, including Geographic Imager, it may be due to a setting in Adobe Photoshop Preferences. Go to Edit > Preferences > Plug-Ins. Locate the ‘Load Extension Panels’ in the Filter and Extension Panels group. If it is unchecked, it prevents all extension panels from loading and the Window > Extensions menu is greyed out and prevents users from opening extension panels manually. When this preference is checked, the Geographic Imager panel will load on start-up.
It is possible to move an imported map from one device with Avenza Maps to another device using AirDrop - a technology for directly transferring files from one Apple device to another and is available on the following:
- iPhone 5 or later
- iPad Pro
- iPad (4th generation) or later
- iPad mini or later
- iPod touch (5th generation) or later
Installing MAPublisher 9.8 on Both Adobe Illustrator CC 2015 and CC 2015.3 Simultaneously (32-bit, Windows only)
During development, Adobe did not change the class identification (CLSID) key for Illustrator CC 2015.3 (32-bit) and therefore it remained the same as CC 2015 (32-bit). These CLSID keys are (usually) unique and MAPublisher uses them to detect which versions of Adobe Illustrator are installed on a machine. However, due to these two versions having identical CLSIDs, MAPublisher 9.8 will only detect one version of Adobe Illustrator if both CC 2015 and CC 2015.3 are installed on the same machine.
Mac users have occasionally seen an issue where MAPublisher panels will display an unreadable font as shown in the image below.