Optimization

Optimizing Point Symbol Placement with MAPublisher LabelPro

This post was contributed by Hans van der Maarel of Red Geographics.


The problem with using GIS data for point symbols is that depending on the scale and symbolization you often end up with symbols partly overlapping each other. Of course, the symbols can be manually moved around after initial placement to get a more aesthetically pleasing result, but that can be a tedious and time-intensive task.

Thankfully, there is a way to automate at least part of this process by using MAPublisher and LabelPro.

Example map of Breda, The Netherlands
(Click for larger version)

Calibrating Your Device’s Compass for Improved Navigation in Avenza Maps

Ensure you're going the right way!

One of the great features of Avenza Maps is being able to navigate offline using your own maps or maps from the Map Store. By tapping the GPS icon twice (once to locate yourself and then again to enable the compass), the map will rotate and align with your compass. Your current location is represented by a blue dot and the little arrow points in the direction you are facing. This feature allows you to navigate easily, however it can be problematic when your devices’ compass isn’t calibrated. If you notice that your blue dot’s arrow is not pointing in the right direction, or isn't functioning as you’d expect, try these steps to calibrate your device’s compass!

Android

Not calibrated (Android)
(Click for larger version)

Best Practices for Processing and Importing Maps into the Avenza Maps App

Avenza Maps is capable of importing and displaying georeferenced maps in several different formats. The app processes a map by rasterizing and tiling it on import. The speed and result of processing will vary depending on the type of file used and the size and dimensions. We'll discuss the types of files allowed and the advantages of each.

Handling GeoJSON Files with Unspecified Projected Coordinate Systems

In the latest GeoJSON specification (2016), the coordinate reference system for all coordinates is a geographic coordinate reference system—using the World Geodetic System 1984 (WGS 84) datum—with longitude and latitude units of decimal degrees. The previous specification (2008) allowed for the use of alternative coordinates systems, but this was removed because of interoperability issues.

Cleanup Lines With MAPublisher Trim and Extend Tools

The latest release of MAPublisher includes the ability to trim and extend objects to a crossing or intersecting path. Extending a path lengthens it to meet the edge of a crossing object and trimming a path cuts the portion that extends past the edge of an intersecting path. Trim and extend tools are commonly used in CAD software and will greatly improve the ability to produce accurate and precise data in MAPublisher and clean-up imported data.

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