[GIS] Looking for an android solution for offline kml/kmz file viewer with gps support

androidgpskmlkmzoffline

I have some KMZ files of cadastral maps. I need to fiscally go to the boundaries of my lands (parcels) and take a look at where they are with the gps and maps support. Some of these places are not covered by the phone network signal.

For this reason I'm looking for an android app that will import my kmz files and let me reach the boundaries position with gps help.

I've used google earth app, but gps position is not working.

Google maps engine app, instead, works well but only with online maps.

Any idea about an app to work offline?

Best Answer

My favorite app for doing these kinds of things is Locus map free. It can import KML file amongst many other formats, and can work completely offline.

If you need a base map, you can either download it within the app (for a fee) or add your own data either in mbtiles, or one of the other myriad formats that it supports.

Related Solutions

Android Maps – Solution for Offline Map App

I did an offline map using the ESRI Android SDK and a custom tile layer. I used an ArcGIS server to generate a tile based map cache, then inserted those tiles into a SQLite database and query them based on row and column from there. It works great and if you need custom maps end to end, it is a very usable method.

package com.main.utilinspect;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.List;

import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonParser;

import android.content.Context;
import android.util.Log;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.esri.core.internal.c.d;
import com.esri.core.internal.c.h;
import com.esri.core.internal.c.l;

import com.esri.android.map.TiledServiceLayer;

public class OfflineDbTiledLayer extends TiledServiceLayer {

File workingDirectory;
String mapDefinition;
String databaseName;
private SQLiteDatabase database;
File blankImage;

byte[] blankImageBytes;

private final Object lock = new Object();


private static final String TAG = "OfflineTiledLayer";  


public OfflineDbTiledLayer(Context paramContext, File workingDirectory, String mapDefinition, String databaseName)  {
    super("required");
    this.workingDirectory = workingDirectory;
    this.mapDefinition = mapDefinition;
    this.databaseName = databaseName;

    String databasePath = workingDirectory.getAbsolutePath() + File.separator + databaseName;

    this.database = SQLiteDatabase.openDatabase(databasePath, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS); 

    this.blankImage = new File(workingDirectory.getAbsolutePath() + File.separator + "blank.png");

    RandomAccessFile raFile = null;

    try {
        raFile = new RandomAccessFile(this.blankImage, "r");

        blankImageBytes = new byte[(int) raFile.length()];
        raFile.readFully(blankImageBytes);

    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }       
    finally {
        if(raFile != null) {
            try {
                raFile.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }   

    h h1 = null;

    try
    {

    JsonParser paramJsonParser = new JsonFactory()
    .createJsonParser(new File(workingDirectory.getAbsolutePath() + File.separator + mapDefinition));
    paramJsonParser.nextToken();    

    h1 = h.a(paramJsonParser, "test");
    }
    catch(Exception ex){

    }       


    setFullExtent(h1.f());      
    setDefaultSpatialReference(h1.c());
    setInitialExtent(h1.e());

    l l1;
    List list;
    int i;
    double ad[] = new double[i = (list = (l1 = h1.d()).h).size()];
    double ad1[] = new double[i];
    for(int j = 0; j < list.size(); j++)
    {
        ad[j] = ((d)list.get(j)).b();
        ad1[j] = ((d)list.get(j)).a();
    }

    setTileInfo(new com.esri.android.map.TiledServiceLayer.TileInfo(l1.f, ad, ad1, i, l1.c, l1.b, l1.a));

    super.initLayer();
    return;     
}   

private void openDatabase(){
    if(!database.isOpen()){
        String databasePath = workingDirectory.getAbsolutePath() + File.separator + databaseName;
        this.database = SQLiteDatabase.openDatabase(databasePath, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS); 
    }
}

private void closeDatabase(){
    if(database.isOpen()){
        this.database.close();
    }
}

@Override
protected byte[] getTile(int level, int column, int row) throws Exception {
    byte[] tileImage;       

    Log.i(TAG, "getTile");

    Log.i(TAG, "getTile - retrieving tile");            

    synchronized(lock) {

        Log.i(TAG, "getTile - entered synchronized block");

        openDatabase();     

        // First check to see if the tile exists in the database
        Cursor tileCursor = database.rawQuery("SELECT image FROM tiles WHERE level = " + Integer.toString(level) + " AND row = " + Integer.toString(row) + " AND column = " + Integer.toString(column), null);

        if(tileCursor != null && tileCursor.getCount() > 0) {
            tileCursor.moveToFirst();
            tileImage = tileCursor.getBlob(0);
            Log.i(TAG, "getTile - tile found, returning image");                        
        }
        else {
            // The tile does not exist in the database, read the blank placeholder tile and serve it
            tileImage = blankImageBytes;
            Log.i(TAG, "getTile - tile not found returning blank");
        }   

        tileCursor.close();     
        this.database.close();
    }

    Log.i(TAG, "getTile - exited synchronized block");

    return tileImage;   
}

}

[GIS] Advanced android app for mapping and GPS logging

The Best is Sport Tracker (originally developed by Nokia)

enter image description here

Will log GPS data like coordinates, altitude, colour codes the route with GPS accuracy/number of satellites (optional)

Exports to GPX and KML (CSV and XML) Can view on the map or via Google Earth on Android (Ice Cream Sandwich - Android 4.0.3 works best) for this.

Available on Google Play (App Store for Android now) https://play.google.com/store/apps/details?id=com.stt.android&hl=en

Video showing the features http://youtu.be/QQUffYt8fRk

Best Answer

Related Solutions

Android Maps – Solution for Offline Map App

[GIS] Advanced android app for mapping and GPS logging

Related Question