Frequently Asked Questions

Below are some of our most frequently asked questions. If you can’t find the information you are looking for here, please contact us.

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Actually you do not have to use the PC application NaviMapper. NaviComputer as a standalone app for Windows Phone works just fine without it.

Nevertheless in our opinion there are many advantages so we strongly recommend using it:

  • Downloading maps on the PC is generally much faster than map download on the phone.
  • Storing your maps and tracks on your PC is important: Remember that once you uninstall/reinstall NaviComputer on your phone, you will loose all maps and tracks on it. Besides that, disc space on the phone is limited in most cases, so you might not want to have all your maps stored on the phone all the time.
  • It is definately the easiest way to tranfer files between your PC and your phone.

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It’s easy. Please check out our tutorial video:


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Like the message says, this usually happens if another application is using port 80 with exclusive access rights. In many cases the problem happens when IIS or another webserver is running on the computer. But also the Skype desktop application can cause the issue because it’s using port 80 as alternative for incoming connections by default. In Skype it can be simply disabled (

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In most cases the firewall on the PC is the reason. Please check the firewall settings and try it again with the firewall disabled. Your firewall must allow incoming and outgoing http (port 80) traffic to NaviMapper.

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You can add online map providers of your choice. The map must be available in the default tile format and you need to know the tile url.

Custom map sources are added by modifying the mapsources.xml file. After modifying the file on your PC, you need to sync NaviComputer with the option “update mapsources.xml” enabled. The new mapsources will be available on your phone after a restart of NaviComputer.

Please make sure to check the usage policies of your map providers. Some providers may restrict the download of their maps. Adding custom map sources is in your own responsibility.

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You will find a file named “mapsources.xml” in your NaviMapper installation directory.

This file describes the online map sources that can be used within NaviMapper/NaviComputer.

You may open this file in a text editor and modify it. You may want to remove MapSource elements that you do not need or add additional map sources by adding MapSource elements.

You can add any mapsource that uses the default tile system as described here.

The following attributes must be entered within a “MapSource”-Tag in the xml:
Copyright(optional): The copyright info.
MinZoom: The lowest available zoomlevel of the map source.
MaxZoom: The highest available zoomlevel of the map source.
TileUrl: The url from where the map tiles are loaded. The placeholder %z, %x and %y are used to specify the tile coordinates.
It is possible to add more than one TileUrl attribute. This way, parallel download from multiple servers is possible.
Note: Due to xml formatting, the character “&” (often used in php urls) must be replaced with “&”


<?xml version="1.0" encoding="utf-8" ?>
<Proxy Address=""/>
<MapSource ID="FreemapSlovakia>

Tip: Finding out the tile url of an online map source is really easy. Simply browse the map online and use a tool like the firefox addon HttpFox to see from which url the tiles are loaded.


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