Mapsui Offline Map

Hi pauldendulk,

first of all i would like to for your amazing job with Mapsui. I succesfully implemented your Mapsui in my project and everything is working fine. But my question is, and the next step in development of my App, is there possibility to load offline Map (is it mbtiles?) in Mapsui? I downloaded my mbtiles and succesfully loaded these mbtiles with “MbTilesTileSource” from Brutile and than created “VectorTileLayer” with this mbtile Source and added this Layer to the map. In Debug is everything fine. Mbtile has been loaded, layer created, datas are there but on the screen I see nothing. Just the white background screen and when I zoom it multiple times it crashes with unhandled exception. Am I doing it right ? Or if not can you give example, sample or anything how to load offline map in Mapsui? Here my code to create layer: public static ILayer CreateTileLayer(string path) { var tileSource = new MbTilesTileSource(new SQLiteConnectionString(path, false), type: MbTilesType.BaseLayer); return new VectorTileLayer(tileSource) { Name = "MbTiles" }; }

Thank you for your time and answer.

Michal

Issue Analytics

State:
Created 6 years ago
Comments:17 (10 by maintainers)

Top GitHub Comments

1reaction

pcloofcommented, Jan 19, 2018

You can also get a certain map extent offline programmatically. The basic approach is (in C#):

Obtain a HttpTileSource object (you can cast a TileLayer.TileSource to a HttpTileSource), suppose the object’s name is ‘X’ for now.
Use X.Schema.GetTileInfos(…) to get a list of TileInfo for a given area and zoom level.
Call X.GetTile(…) on each TileInfo obtained in step 2. This gives you the raw bytes of each tile, provided that you have wifi or data enabled.
Store the necessary TileInfo properties and the raw tile data.
You can use the data later when offline. You create a TileProvider based on your tile data, put it in a TileSource and set this as source for your map layer.

Basically you use the same methods that are normally used under the bonnet while zooming and panning a map. Therefore, compatability of the data is self-evident and you don’t need external tools. To use this correctly, you need to know the bounding box of the map area you need and the zoom level you want, so maybe you need some others websites or tools to determine these values in the language that Mapsui expects.

0reactions

pcloofcommented, May 10, 2018

I haven’t been working on my app the last few weeks, so not really paying much attention to github, sorry for that. I use OpenStreetMap and basically get the tile layer with this code (step 1 of my previous post):

using Mapsui.Layers; using Mapsui.Utilities; … TileLayer tileLayer = OpenStreetMap.CreateTileLayer(); HttpTileSource tileSource = tileLayer.TileSource as HttpTileSource;

Top Results From Across the Web

Introduction

Offline maps are possible using MBTiles implemented with BruTile.MBTiles. This stores map tiles in a sqlite file. Generates static map images to could...

unable to load offline map using Mapsui, using world.mbtiles

The Mapsui repository has a working sample that shows the world.mbtiles. You could start from that working sample and work towards your own ......

Is there a way to implement an offline map?

Maps uses Google maps and Apple maps for IOS. But they are all online. I want a map that wouldn't have any un...

Offline navigation for Xamarin forms? - Microsoft Q&A

I was able to build very basic navigation using Mapsui.Forms (map view) and Itinero (routing). Routing database is already offline however ...

An own map with Mapsui - in Xamarin.Forms

Create your own online or offline map for Android, iOS and UWP with Mapsui and Xamarin.Forms.