How to download
How to view downloaded offline map
How to output map to bmp,jpg,tiff file
How to export tiles to sqlite database
How to use offline maps in RMaps or OruxMaps
How to download?
See the screenshot. It is very easy to use.
This screen shot shows how to download satellite imagery (not historical imagery.)
This screen shot shows how to download historical imagery:
Step 1, Enter a task name, such like "mytask.geid". All task files are saved as *.geid.
If you want to continue an old task, click button "Open task... ".
Step 2, Select the Maps type, there are 2 types: Google Earth Satellite Imagry, Google Earth Satellite Historical Imagery.
If you selectd the Google Earth Satellite Historical Imagery, you need to input the historical imagery date to download, in format YYYY-MM-DD.
You can get the date from Google Earth client:
Note: if the inputed date was not found on the google's server, the product will download the closest date tiles for you.
Step 3, Define the zoom level scope. The zoom level defines the image precision. For example, if you define "From zoom"=15, "To zoom"=18, then it will download images at zoom=15, 16 ,17,18. (For trial version, the max zoom level is 13.)
Step 4 , There are 4 parameters (Left Longitude, Right Longitude, Top Latitude, Bottom Latitude) to define the area scope of images that you want to download.
Left Longitude: -180<=value<=180, for East, the value is positive, for West, the value is negative.
Right Longitude:-180<=value<=180, for East, the value is positive, for West, the value is negative.
Top Latitude:-85<=value<=85,for North, the value is positive, for South, the value is negative.
Bottom Latitude:-85<=value<=85,for North, the value is positive, for South, the value is negative.
For longitude and latitude, the input measurement is degree. You can convert the measurement of "Degrees, Minutes,Seconds" to "Degrees" by click menu "Tools->Convert 'Degrees,Minutes,Seconds' to 'Degrees'...".
Step 5 ,
Select a path to save the project and downloaded images
Step 6 , Then click button "Start", OK, start downloading now ... !
When downloading, the log window will display the downloading process. When finished, the log will be saved to a file.
In some areas, there are no high zoom level tiles, so it will show "no tile here, got a blank tile" message and you will get a blank tile image.
How to view downloaded offline map?
You can view downloaded maps without combining them into one big BMP.
We provide a tool to view the images, you can run it from menu "Tools"->"Map Viewer".
Then open a task from menu "File"->"Open task..." to view the map.
Mapviewer: satellite imagery, not historical
Mapviewer: historical imagery at 2004-05-05
Mapviewer: historical imagery at 2015-1-4
How to output map to BMP/TIFF/JPG file?
After downloading, all small images are saved on your disk. Then you can combine them into one big image map.
We provide a tool to combine the images, you can run it from menu "Tools"->"Map Combiner".
The flat file on google earth is for Lat/Long projection (EPSG:4326), but google maps uses Web Mecator projection (EPSG:3857), if you want to reprojection the downloaded images, you can check on the "Re-projection to Web Mecator (TIFF)" option.
How to export tiles to sqlite database?
When downloading finished, all small images are saved on your disk. Then you can export them into a sqlite database (MBtiles format).
In "Map Viewer" , you can click menu "Export"->"Export as sqlite database.. ", to create your sqlite file.
How to use offline maps in RMaps or OruxMaps?
After exporting all downloaded tiles into a sqlite database, then you can use the sqlite file in some Android apps, such like RMaps and OruxMaps.
For RMaps: When you finished export tiles to sqlite database with export type 'For RMaps', you will get a file: your_task_name.geid.sqlitedb, then copy it to your Android device, to your RMaps installed path, might be like '/sdcard/rmaps/maps/', then refresh your RMaps offline maps, you will see a new offline maps "your_task_name_geid.sqlitedb".
Note: when you view the offline maps in RMaps, you need to zoom it to your downloaded zoom level, otherwise, it will show blank maps.
For OruxMaps: When you finished export tiles to sqlite database with export type 'For Oruxmaps', you will get two files: your_task_name.geid.otrk2, your_task_name.geid.OruxMapsImages.db, you need to rename the your_task_name.geid.OruxMapsImages.db to OruxMapsImages.db, then on your Android device, in your OruxMaps installed path, might be like '/storage/emulated/0/oruxmaps/mapfiles/', create a new folder suchlike 'exmaple', then copy "OruxMapsImages.db" and "your_task_name.geid.otrk2.xml" to this folder, refresh your oruxmaps offline maps, you will see a new offline maps "your_task_name_geid_map".