How to download yahoo satellite maps images
Some problems when downloading
How to view downloaded maps
How to combine small images into one big image
How to download Yahoo Satellite Maps images?
See the screenshot. It is very easy to use.
Firstly, enter a project name, such like "paris_17.ysmd". All project files are saved as *.ysmd. If you want to continue a old project, click button "Open project".
There are 4 parameters (Left Longitude, Right Longitude, Top Latitude, Bottom Latitude) to define the area scope of images that you want to download.
The zoom parameter define the image precision.
Select a path to save the project and downloaded images, 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. 
Parameters explainment:
1. Left Longitude: -180<value<180, for East, the value is positive, for West, the value is negative.
2. Right Longitude:-180<value<180, for East, the value is positive, for West, the value is negative.
3. Top Latitude:-85<value<85,for North, the value is positive,for South, the value is negative.
4. Bottom Latitude:-85<value<85, for North, the value is positive,for South, the value is negative.
5. Zoom: defines the image precision, the max zoom is 19. (For trial version, the max zoom is 13)
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'...".
Some problems:
For some area, there are not high precision images on yahoo's server, so may be you get a image like the followed:

. If this happend, you need to set smaller zoom level to download.
How to view downloaded map images?
You can view downloaded maps without combining them into one big BMP.
We provide a tool : You can run it from menu "Tools"->"Map Viewer".
Then open a project from menu "File"->"Open task.." to view the map. 
How to combine small images into one big image?
After downloading, all small images are saved on your disk. Then you can combine them into one big image map.
We provide a tool : You can run it from menu "Tools"->"Map Combiner ... ".

The output big image is in BMP format. You can convert it to other format by yourself using some image tools such like PhotoShop.
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