Metadata for MSH images

Data are TIFF images and accompanying world files for display in a geographic information system.  Shaded relief  maps constructed by photogrammetry from aerial photographs taken on the date listed in the filename.  New data on each DEM show changes in the Mount St. Helens crater and are shown overlying a lidar base of the Mount St. Helens edifice captured in September 2003, in order to extend the imagery beyond the crater rim.  

COORDINATE SYSTEM DESCRIPTION

Projection		UTM
Zone		10
Datum		NAD83
Units		METERS             
Spheroid		GRS1980
Vertical Datum	NAVD88

Cell size is 2 meters.


BOUNDING COORDINATES

West_Bounding_Coordinate: 	-122.21
East_Bounding_Coordinate: 	-122.17
North_Bounding_Coordinate: 	46.22
South_Bounding_Coordinate: 	46.18

IMAGE EXTENT

On ground		Roughly a square 2.85 km wide by 3.16 km wide (about 9 km2).
Image		5387 pixels wide by 5960 pixels high


REFERENCES

Schilling, S.P., Thompson, R.A., Messerich, J.A., and Iwatsubo, E.Y., 2008, Use of digital aerophotogrammetry to determine rates of lava dome growth, Mount St. Helens, Washington, 2004–2005, chap. 8 of Sherrod, D.R., Scott, W.E., and Stauffer, P.H., eds., A volcano rekindled: the renewed eruption of Mount St. Helens, 2004–2006: U.S. Geological Survey Professional Paper 1750 (this volume).

Messerich, J.A., Schilling, S.P., and Thompson, R.A., 2008, Digital elevation models of the pre-eruption 2000 crater and 2004–2007 dome-building eruption at Mount St. Helens, Washington, U.S.A.: U.S. Geological Survey Open-File Report 2008–1169, in press.