1. How to Use ShpTrans? - Shapefile Conversion
BaconLin, 6, 22,2015

2. Brainstorm & Conception
If you have two shapefile, one’s coordination is WGS 84, and the other is TWD 97 TM2, how to make their coordination system the same?
Using the ShpTrans to transform WGS 84 into TWD 97 TM2, or transform TWD 97 TM2 into WGS 84.
This part is very important, because the website open data’s coordination system aren’t all identical.
So we must understand “How to Use ShpTrans?”.

3. Software & Case Resource Download
ShpTrans Software
Taiwan Village (TWD97 TM2)
Taiwan Village (WGS84)

4. Objective
Using the ShpTrans to transform Taiwan Village (WGS84) into TWD97 TM2
Checking whether the transformation outcome is equal to the other (TWD97 TM2).

5. ShpTrans Going to http://www.ascc.sinica.edu.tw/gis/ISTIS/tools.html
Please download me !

6. Download Completion
If your computer operation system(OS) is Win8, you can directly open.
If not you should unzip the file.

7. Run the “ShpTrans.exe” This software can directly be used,
in other words, it’s portable.

8. How to use?
First, you must prepare file which you want to transform.

9. How to use? Open the ShpTrans. A.Find the shapefile location.
B.It will read your shapefile. A. B.

10. Transformation
First, you should think the whole step, because this case should transform three times. But it’s only one step by one step…
So overall step are…(WGS84 TWD97 TM2)
I. WGS84 to TWD67
II.TWD67 to TWD67 TM2
III. TWD67 TM2 to TWD97 TM2
II.
III. I.

11. Step I
WGS84 to TWD67
Choose the option,
and click “Run” button.

12. Step I
It means successful.

13. Step I Click “確定” button It doesn’t update automatically,
so you should click another folder,
and then click back.
You will find the new file.
Name: OriginalName_1

14. Step II TWD67 to TWD67 TM2 Only choose the new shp!
and choose the correct
transformation way!

15. Step III
TWD67 TM2 to TWD97 TM2
Follow above mentioned
procedure…

16. Outcome
You will get three shp…

17. Examine – Are the two shapefile 100% equal?

18. Examine Outcome
Absolutely equal!
Area = Area (km*km)

19. Note Remember to set “new shapefile” coordination system in ArcGis!
“The devil is in the details” and “Do the thing right!”