User`s guide

16-7

• You might need to manually set the renderer for proper display of some patch data

See the release note “Map Axes Now Display Transparent Objects More Easily” on page

16-8 for information about rendering and the Mapping Toolbox demo mapexgshhs

for an example of a situation where polygon topology necessitates manual setting of the

renderer.

Higher Quality boston.tif GeoTIFF Satellite Image

The original boston.tif GeoTIFF satellite image has been replaced by a higher

resolution image, created by and provided courtesy of GeoEye™. The new image has the

same name as the old one, boston.tif. The new boston.tif file, and an overview

3.2808333333 U.S. survey feet (one meter). The original image was 720-by-1120 pixels

and had a ground pixel size of four meters. Both images cover the downtown section

of Boston, Massachusetts, the Charles River, and parts of Cambridge. The new image

is a “pan-sharpened” multispectral image with visible red, green, and blue bands, and

is stored in RGB form. The original image was also multispectral, but was a simple

composite of red, green, and blue bands, and it was written to the GeoTIFF file as

an indexed-color image. One additional change is that rather using meters, the new

image is spatially referenced to the Massachusetts State Plane Mainland coordinate

system with units of U.S. survey feet. The overview image, boston_ovr.jpg, is

referenced to latitude-longitude, with a ground pixel size of approximately 16 meters.

For further information, refer to the text files boston.txt, boston_ovr.txt, and

boston_metadata.txt in toolbox/map/mapdata.

Compatibility Considerations

Older satellite images of Boston and a demo have been removed from Mapping Toolbox

directories. The new boston.tif and boston_ovr.jpg images replace the images

having the same names previously included in toolbox/map/mapdemos. In addition,

several older images related to boston.tif have been removed:

• boston_red.tif

• boston_green.tif

• boston_blue.tif

• boston_pan.tif