Analyzing USGS Site Filesusing OLAP

Ilya Zaslavsky, June 12, 2007

Pseudo-Mapswith OLAP:

the USGS Cube without time dimension

US Map of USGS Observations

Antarctica

Puerto Rico

Hawaii

Alaska

US Map of USGS Observations – by ReportedTypeCount

US Map of USGS Observations – by Mean Available Data

US Map of USGS Observations – by Max Period of Record

US Map of USGS Observations – by Mean Period of Record

USGS Observations: Californiaby Mean Available Data

USGS Observations: Californiaby Available Data Total

Available Data by Latitude Bands

Alaska

Big IslandMaui Kauai

Corpus Christi

USGS data availability by decades:

the USGS Cube with time dimension

The larger cube (with time dimension):Available data by HUCs by decade

Different types of nutrients by decade: Available Data Total

Some physical properties by decade: Available Data Total

Same without discharge, gage height, temperature and precipitation (the four most common, in that order): Available Data Total