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WebMapper Help

WebMapper is a Java applet for finding Paleoclimate data held at the World Data Center for Paleoclimatology. Currently you can use WebMapper to locate and view the WDC's pollen, tree-ring, ice core, plant macrofossil, paleocean, phenology, and coral data.

With WebMapper you can zoom the map and select individual sites. For each site, WebMapper displays summary information (e.g., site name, investigator, latitude, longitude (in decimal degrees), place, altitude, the number of samples, variables, radiocarbon dates, species, date ranges, etc.); the publications associated with the site; diagrams or plots. In the future WebMapper will also provide query capabilities.

System Requirements

Windows To run WebMapper you must be using Microsoft Internet Explorer 4.0 or higher (see, or Netscape 4.5 or higher (see, or Mozilla 1.x or higher (see
Linux and Solaris To run WebMapper you must be using Netscape 4.5 or higher (see, or Mozilla 1.x or higher (see
Macintosh To run WebMapper you must be using Microsoft Internet Explorer 4.0 or higher (see or Netscape 6.0 or higher (see

Special notes for Macintosh Users

Java Virtual Machine Your browser must be using the Apple Mac OS Runtime for Java (MRJ) (version 2.0 or higher). Apple MRJ is automatically installed with Mac OS 8.1 and higher. Apple MRJ can also be installed under MacOS 7.6.6 or higher but this configuration is not supported by Apple (to download Apple MRJ go to See Browsers section below for how to set your Java Virtual Machine.
Microsoft Internet Explorer
To set your Java Virtual Machine to the Apple MRJ: Under Internet Explorer go to Preferences in the Edit Menu. From the Preference dialog select Java and choose Apple MRJ as your Java Virtual Machine. After changing your Java Virtual Machine you must quit the browser and restart it.
Netscape 6.0 will automatically use the Apple MRJ as your Java Virtual Machine. However, Netscape 6.0 does not fully support Java so some features of WebMapper will not function.
Hardware Minimum of Power PC with 48 megabytes of RAM.

Comments and ideas for improvement are welcome. Contact:

Development team: Wendy Gross and John Keltner (NOAA Paleoclimatology Program), with assistance from David Anderson, Bruce Bauer, Mark Eakin, Ed Gille, Mike Hartman, and Connie Woodhouse

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Downloaded Tuesday, 17-Jan-2017 16:16:23 EST
Last Updated Wednesday, 20-Aug-2008 11:33:56 EDT by
Please see the Paleoclimatology Contact Page or the NCDC Contact Page if you have questions or comments.