How to download
Some problems when downloading
How to view downloaded maps
How to combine small images into one big image
How to know the longitude and latitude of each image
How to download?
See the screenshot. It is very easy to use.
Firstly, enter a Task name, such like "example.gmcn". All task files are saved as *.gmcn. If you want to continue a old task, click button "Open task ".
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 task and downloaded images, then click button "Download", 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 11)
The followed sketch map explains the area scope:
For longitude and latitude, the input measurement is degree. You can convert the measurement of "Degrees, Minutes,Seconds" to "Degrees" by click menu
"Misc->Convert 'Degrees,Minutes,Seconds' to 'Degrees'...".
How to get the lat/long information from Google Maps?
On Google Maps, You can right-click a location on the map and select "What's here?" The coordinates of that location will automatically appear in the Search box at the top of the page.
Some problems:
1. Google map uses a protection mechanism to keep a good quality of service. If one makes too much requests, google map will add its IP address to a blacklist, and you may see a message:
403 forbidden
If this happend, Google Maps Downloader will show a messge in log window: May be your IP is banned by Google. Then you must wait for some time or change to another IP.
2. For some area, there are not high precision images on google's server, so may be caused a error when you try to download such images. If this happend, you need to set smaller zoom size to download. (The max zoom level is 19)
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 project..." 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"->"Combine images... ".
The output big image is in BMP format. You can convert it to other format by yourself using some image tools such like PhotoShop.
How to know the longitude and latitude of each image
There are two methods to know the longitude and latitude of every downloaded image.
1. After downloading, the software will create a text file named as "projectname_list.txt" in your project path. In this file all the images' longigude and latitude information are saved.
The file looks like:
ImageFileName Left_Edge_Longitude Right_Edge_Longitude Top_Edge_Latitude Bottom_Edge_Latitude
gmcn_109285_53966_17.png: 120.16021728515625 120.16296386718750 30.26381183796581 30.26143954784981
gmcn_109285_53967_17.png: 120.16021728515625 120.16296386718750 30.26143954784981 30.25906720042424
gmcn_109285_53968_17.png: 120.16021728515625 120.16296386718750 30.25906720042424 30.25669479569174
gmcn_109285_53969_17.png: 120.16021728515625 120.16296386718750 30.25669479569174 30.25432233365500
......
2. When you view map in Map Viewer, the longitude and latitude will be displayed in the statusbar.
And in the log file, the exactly longitude and latitude of the downloaded area are saved as Left Longitude download.., etc.. see the followed example.
An example of log file:
Project: C:\downloads\hangzhou17.gmcn
Now time is:2011-12-15 10:55:12
[MapsType]
MapsType=101
Left Longitude input= 120.160904
Right Longitude input= 120.190001
Top Latitude input= 30.262329
Bottom Latitude input= 30.242533
MinX = 109285
MinY = 53966
MaxX = 109295
MaxY = 53974
Left Longitude download=120.160217285156
Right Longitude download=120.1904296875
Top Latitude download=30.2638118379658
Bottom Latitude download=30.2424591640018
All images' scope information are saved to C:\downloads\hangzhou17_list.txt
Total count of images would be downloaded: 99
Download threads count: 8
Zoom level: 17
path: C:\downloads\
Start downloading...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
T2:seq=1,gmcn_109285_53966_17.png OK
T1:seq=8,gmcn_109285_53973_17.png OK
T3:seq=2,gmcn_109285_53967_17.png OK
T4:seq=3,gmcn_109285_53968_17.png OK
T5:seq=4,gmcn_109285_53969_17.png OK
T6:seq=5,gmcn_109285_53970_17.png OK
T7:seq=6,gmcn_109285_53971_17.png OK
.......
T7:seq=94,gmcn_109295_53969_17.png OK
T8:seq=95,gmcn_109295_53970_17.png OK
T1 Finished.
T2:seq=97,gmcn_109295_53972_17.png OK
T3:seq=98,gmcn_109295_53973_17.png OK
T5 Finished.
T4:seq=99,gmcn_109295_53974_17.png OK
T6 Finished.
T7 Finished.
T8 Finished.
T2 Finished.
T3 Finished.
T4 Finished.
--------------------------------
Task Stoped!
Now time:2011-12-15 10:55:29
Log file has been saved as C:\downloads\hangzhou17_log.txt
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