Tiff/tfw, JPG/jpgw coordinate file format (6 parameters)

0.1
0
0
-0.1
399990
4400510

 

The meanings of each row are as follows:

1. The X resolution scale of a pixel in the map unit in the X direction.
2 Translation volume.
3. Rotation quantity.
4. negative value of the Y Resolution scale of a pixel in a map unit in the Y direction.
X coordinate of 5 pixels, 1 (top left.
Y coordinate of 6 pixels, 1 (top left.

 

 

Tfw coordinate information file imported from raster images

TfwFile is aboutTiffText File of image coordinate information,ArcInfo,Microstation,AutoCAD. This file defines the affine relationship between pixel coordinates and actual geographic coordinates of an image. The basic principle is as follows:

X' = AX + by + c
Y' = dx + ey + F

 

Where:

X' =Geography of pixelsXCoordinates

Y' =Geography of pixelsYCoordinates

X =Pixel coordinates[Column number]

Y=Pixel coordinates[Row number]

A = xPixel resolution in the direction

D, B = rotating system

E = yPixel resolution in the direction

C =Pixel center X coordinate in the upper left corner of the raster Map

F =Y coordinate of the pixel center in the upper left corner of the raster Map

Instance:

I. tif format image, the image resolution is 980*784 * 24b, the coordinates of the pixel center in the upper left corner are [1000, 800], the geographic distance in the X direction is m, and the geographic distance in the Y direction is M, the coordinate information file is as follows:

1.02040816326531[XPixel resolution in the direction]

0.0 d[Rotation coefficient]

0.0 BRotating System]

-1.02040816326531 E[Pixel resolution in the Y direction]

428000 C[Pixel center X coordinate in the upper left corner of the raster map]

2556800 F[Y coordinate of the pixel center in the upper left corner of the raster map]