Turbellarian Biogeographic Database
I. Tools we use for mapping collection records
When available, geographic coordinates for collecting sites are taken from
publications. Typically, however, the publications provide only
place names where collections were made, and we then must use other resources to
map those sites out.
We take geographic coordinates from maps
and charts, including the following sources.
Many of these sources use the same data, but they differ in how queries work on
them and in whether their maps can be enlarged for zooming in on specific
locales. When all else fails, we use a published atlas or search on Google to see if
the place name has a link providing coordinates. Also increasingly useful is Google
Books which has made scans of older literature available (where reprints are scarce),
and this can yield not only specific locality information but useful
figures and scientific information on taxa and geographic sites.
The main tools
- Polistes Global Mapper
- Google Maps to find
place names, together with the
Position Finder maplet by Thomas Duebendorfer to pick coordinates in their vicinity
- Columbia Gazetteer of the World (online and paper)
- Published (paper) Atlases, Gazetteers, Charts, and Maps
II. Instructions for using maps
Maps of collecting sites can be reached from the table listing
species distributions (shown when the
links in species lists is clicked. Both maps of individual sites
and of whole species distributions are available:
- Maps of individual sites ("map" in distribution table) are drawn using a
Google Maps API.
- Maps of distribution of species (multiple points on a single map) are
reached from the "map all distribution points" link at the end (bottom)
of a species distribution list. These maps are drawn using
(Google Maps (with their API registration
Ron Kozlowski provided the PHP class that calls the maps from Google. Moving
around on the map and using the markers to display more data is done as with
any Google maps:
- Panning -- any part of the world map can be reached
by clicking on the map background and dragging it or by clicking
on the arrows (
in its upper left corner.
- Zooming in or out on a map -- Magnification of the view
can be changed with the
buttons or in larger jumps with the scale slider.
- Map styles -- Maps can be drawn as plain maps or satellite
images or as a hybrid (overlay) of both. The choice is made by clicking
on the Map / Satellite / Hybrid boxes in the upper right of a map. Whichever
type is selected will be indicated by bolding of the style name.
- Refreshing / redrawing -- The original view of a map can be reset
with the Refresh button of the browser window. That view should be centered
on the center of distribution points and at a magnification (scale) that
shows all points (except possibly points in the western Pacific--pan to check).
1. Kawakatsu M(1982) A commentary on "Polycladida of Japan," a paper by the late Dr. Kojiro Kato published in l944, with its reprint edition. Toppan Printing Co., Sapporo, Japan