National Oceanic and Atmospheric Administration (NOAA), National Environmental Satellite, Data, and Information Service(NESDIS)

Global Monthly AVHRR Climatology Over Land Clear-sky top-of-the-atmosphere variables

by Garik Gutman, Dan Tarpley, Aleksandr Ignatov, NOAA/NESDIS Satellite Research Laboratory, Camp Springs, Maryland
and Steve Olson, Research and Data Systems Corporation, Greenbelt, Maryland.
This is Volume 3 in the Global Change Data Base:
Editor David Hastings, NOAA/NESDIS National Geophysical Data Center, Boulder, Colorado

Data Access and Visualization Software

Has the material on GeoVu been updated since this CD was published?

For quick instructions on installing/running GeoVu click here

Overview

GeoVu addresses several barriers to data access:

1. It provides access to many different types of data (including spatial, temporal, in-situ and satellite data sets) in many different formats without requiring data reformatting.

2. It provides direct and intuitive access to metadata and documentation.

3. It provides a common user-friendly interface to many data collections published by NOAA and others.

4. It runs identically under three major operating systems: MS-Windows, Macintosh, and Unix.

GeoVu Capabilities

• Pan and zoom images and point data plots
• Generate profiles of data values
• Examine individual data points in an image grid
• Modify color palettes to create more meaningful displays
• Extract subsets of large data sets for further analysis by other data analysis programs
• Overlay geopolitical, coast and river boundary information onto georeferenced data
• View histograms generated from image data
• View metadata: data about the data
• View slide shows and animations of image data files

Data Supported by GeoVu

GeoVu can display any data type that can be described by a FreeForm format. GeoVu also provides built-in support for the following data types: GIF, BMP, PCX, AVHRR_GAC_1b_unpacked, Binary_raster, ERDAS_raster, GEOVU_raster, IDRISI_raster_version3, IDRISI_version4, McIDAS_PC_IMAGE, McIDAS_UNIX_IMAGE, Modified_DTED_DEM_format.

GeoVu does not support hierarchical formats like HDF or NetCDF, though there are tools which can convert these formats to ones GeoVu can read.

Sample Data for Use with GeoVu

1. NGDC's Solid Earth Division puts out a number of CD ROMs, most with GeoVu menus.
2. The GeoVu Sampler data set is available online:

   Download Sampler for Macintosh (9MB). Run gvdata.sea to expand.

   Download Sampler for Windows (9MB). Run sampler.exe -d to expand.

   Download Sampler for Unix (9MB). Use uncompress and tar xvf to expand.

   To use the Sampler data, copy the sampler.men file to your GeoVu directory, then when you open Sampler data, you will need to specify the directory in which the gvdata directory was created after downloading. In other words, you will need to type something like:

   "My Hard Disk:Cool Data Collections" (Macintosh, ":" separates folders)

   "c:\cooldata" (Windows, "\" separates directories)

   "/home/users/jqsmith/cool_data" (Unix, "/" separates directories)

GeoVu Availability

• Windows
• Macintosh
• Sun
• SGI

• Download Software and Documentation

file://aareadm2.htm
Revised: 25 February 1997

Go to the Environmental Data at NGDC Home Page.
Go to the National Geophysical Data Center Home Page.
Go to the National Climatic Data Center Home Page.