San Vicente map MapGazer – thanks


Download MapGazer

Getting started

Using marks:
   Mark properties

Using icons

Using transparency

General settings

Getting maps

Using map tools

Go to location

Coordinate formats

GPX files

Elevation data

Aspect ratio

Keyboard shortcuts

Command line


Except as mentioned below, MapGazer is a new application, written since November 2014.  It is written in C, and follows the object-like code conventions I developed for the Tollos supervisor.  As of May 2021, it comprises about 78,000 lines of my code.


Special thanks are due to:

  • MyTrails’ author Pierre-Luc Paour, who motivated me to get back into mapping projects.

  • David Law, my geography teacher at school in the 1960s, who inspired my life-long love of maps and mapping.

  • Bill Collis, for many good suggestions and encouragement.

  • Lode Vandevenne – for lodepng, which allowed me to handle PNG-encoded map tiles and write PNG images.

  • The Independent JPEG Group (Thomas G. Lane, Guido Vollbeding, et al) for jpeglib, used for JPG-encoded map tiles.

  • Daniel Radu and the rest of the Advanced Installer team that made it possible to create the simple .msi Windows installer for this application.

  • Darrell Commander, for libjpeg-turbo development and support, and many useful suggestions (MapGazer uses libjpeg-turbo as a switchable alternative to jpeglib, giving file/tile loads that are twice as fast).

  • Ed Williams for his Aviation Formulary.

  • Open Street Map and its contributors, for the ‘Globe’ starter map included with MapGazer.

  • Ruurd-Jan Idenburg, for the South-Sweden sample map, and for several suggestions for enhancements.

  • Charles Petzold – it had been ten years since I wrote a Windows application, and his Programming Windows (5th edition) book proved as useful now as it did back then.

  • The developers of GCC – the compiler used to compile MapGazer.

  • All the people that put together the Win-builds and MingW resources that made it possible to build this application using GCC.

  • The Microsoft, IBM, and other teams who built the Windows and OS/2 APIs that underpin the application.

MapGazer and these web pages were written by Mike Cowlishaw; Please send me any corrections, suggestions, etc.
All content Copyright © Mike Cowlishaw, 2014–2022, except where marked otherwise.  All rights reserved. The pages here, and the MapGazer program, are for non-commercial use only. Privacy policy: the Speleotrove website records no personal information and sets no ‘cookies’. However, statistics, etc. might be recorded by the web hosting service.

This page was last updated on 2021-05-29 by mfc.