Triton TritonMap Instrukcja Użytkownika Pobierz pdf (Strona 135)

June 2004 DelphMap™ User's Manual

TABLE 4. Arrangement of a world file’s data

Typical World

File’s Contents

Meaning of the Contents

12.34567890123456 the x-scale vector size of a pixel, in map units

0.00000000000000 the amount of rotation for a row (that is, along the

x-scale)

0.00000000000000 the amount of rotation for a column (that is, along

the

y-scale)

-12.34567890123456 the y-scale vector size of a pixel, in map units;

this is the negative value of the pixel’s

x-scale

vector size, so that any differences between

image and non-image origins can be

distinguished.

987654.98765432101234 the x coordinate, in map units, of the center of

the upper left pixel

9876543.98765432101234 the y coordinate, in map units, of the center of

the upper left pixel

Note: Software capable of reading a world file always expects to read data in

the order of the values are shown in Table 4.

To get an image’s geo-coordinates from DelphMap

• Click

Project→Project Information...

DelphMap displays a dialog box containing the coordinate information.

An example appears in Figure 59.

Chapter 8: TIFF and GeoTIFF Differences 121

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