Albert Everett Wieslander

The Wieslander Vegetation Type Map (VTM) collection is a dataset compiled in the 1920s and 30s, consisting of photos, species inventories, plot maps, and vegetation maps covering most of California. The data provide a snapshot of the state''s vegetation in the early 20th century, making the collection an invaluable resource for examining changes in land cover and use, or habitat restoration. The goal of the current VTM Project, a collaboration between groups at U.C. Berkeley and U.C. Davis, is to digitize the dataset for preservation and distribution. Learn more...

About VTM

We're happy to announce the VTM web site is now fully live. All the data we have are available for download in the Data section. You can explore the data before downloading in our MapBrowser webGIS application, or learn about the VTM project and data in the About section. If you have questions or things you want to discuss, check out our Discussion Group at Google Groups.

Posted by ken-ichi on 08.21.06 @ 4:19 PM


  • Browse all VTM data
  • Search for data in your area
  • Query VTM plot points



Download maps, GIS data, plot data, query the plot data, or peruse the photo collection.

* External link to UCB Library VTM photo site


The VTM Discussion Group is a place to discuss the project and the data with people involved in producing the data and with other users. Are you using the data in an interesting way? Have you found new challenges in working with the data? This is the place to let everyone know!

VTM Discussion Group

Kelly, M., 2005 VTM Newsletter 2005. PDF.

Kelly, M., B. Allen-Diaz, and N. Kobzina. Digitization of a historic dataset: the Wieslander California vegetation type mapping project. Accepted in Madrono

Keeley, J.E., 2004. VTM plots as evidence of historical change: goldmine or landmine? Madrono 51(4): 372-378.

Franklin, J., 2002. Enhancing a regional vegetation map with predictive models of dominant plant species in chaparral. Applied Vegetation Science, 5: 133-146.

Ertter, B., 2000. Our undiscovered heritage: Past and future prospects for species-level botanical inventory. Madrono, 47(4): 237-252.

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