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.tdts". All task files are saved as *.tdts. 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 18. (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?
You can get it On Google Maps: 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. For some area, there are not high precision images on 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 18)
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
tdts_219522_42824_18.jpg: 121.46759033203125 121.46896362304688 31.19018554687500 31.18881225585938
tdts_219522_42825_18.jpg: 121.46759033203125 121.46896362304688 31.18881225585938 31.18743896484375
tdts_219522_42826_18.jpg: 121.46759033203125 121.46896362304688 31.18743896484375 31.18606567382812
tdts_219522_42827_18.jpg: 121.46759033203125 121.46896362304688 31.18606567382812 31.18469238281250
tdts_219522_42828_18.jpg: 121.46759033203125 121.46896362304688 31.18469238281250 31.18331909179688
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\shanghai_18.tdts
Now time is:2011-12-19 12:52:27
[MapsType]
MapsType=102
Left Longitude input= 121.46862
Right Longitude input= 121.495957
Top Latitude input= 31.189197
Bottom Latitude input= 31.175577
MinX = 219522
MinY = 42824
MaxX = 219542
MaxY = 42834
Left Longitude download=121.467590332031
Right Longitude download=121.496429443359
Top Latitude download=31.190185546875
Bottom Latitude download=31.1750793457031
All images' scope information are saved to C:\Downloads\shanghai_18_list.txt
Total count of images would be downloaded: 231
Download threads count: 8
Zoom level: 18
path: C:\Downloads\
Start downloading...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
T1:seq=8,tdts_219522_42831_18.jpg OK
T2:seq=1,tdts_219522_42824_18.jpg OK
T3:seq=2,tdts_219522_42825_18.jpg OK
T4:seq=3,tdts_219522_42826_18.jpg OK
T5:seq=4,tdts_219522_42827_18.jpg OK
......
T3 Finished.
T4 Finished.
T5:seq=212,tdts_219541_42826_18.jpg OK
T5:seq=220,tdts_219541_42834_18.jpg OK
T5:seq=228,tdts_219542_42831_18.jpg OK
T5 Finished.
--------------------------------
Task Stoped!
Now time:2011-12-19 12:53:20
Log file has been saved as C:\Downloads\shanghai_18_log.txt
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