Calflora is working with
the Bay Area
Early Detection Network
the California Invasive Plant Council(Cal-IPC)
to help collect and map weed data across California.
These organizations are embarked on an ambitious program of
weed data gathering -- follow the links above for more information.
RECORDING ABSENCE IN A SIMPLE SURVEY
It is possible to record the absence of a plant by indicating
the name of the plant,
the area where you looked for it, and
the date when you looked for it.
Here is how:
observation of the weed, preferably with a photo; and
Associate your observation with the
Early Detection Target
This ensures that other people in that group
can easily find your record
and decide what to do about the weed.
December 18, 2013:
Calflora has contributed county level records of non-native
plants to EddMAPS.
October 2, 2012:
Calflora has contributed 230K non-native
plant observations to the Calfornia Department of
Fish and Game
The data that appears on BIOS is the result of
a long conversation with the folks at BIOS about exactly
what fields etc. they wanted to be included.
Interestingly, lines and polygons are not included.
Each record has a field indicating location quality (relative
to the whole dataset) and a field indicating overall record quality
(relative to the whole dataset).
UC Integrated Pest Management (UC Davis)
has excellent coverage of agricultural weeds at the
There are now links to the UC-IPM weed detail pages
from each relevant Calflora Taxon Report page -- for instance,
Abutilon theophrasti (the link is in Other Sources, bottom right).
All weeds covered by UC-IPM are also available as a
plant list (or an
Illustrated Plant List).
uploaded 137,481 observation records
during a six month period ending October 12, 2011.
First, a number of partner organizations contributed their
data using the
Metadata Catalog application.
Then Cynthia used the
application on the contributed data,
and when necessary, contacted data contributors to resolve
ambiguous taxa or other details.
The records are mostly of weeds, but include some native plants
and a great deal of shape data --
a huge effort with a huge benefit.
At the October, 2011 Cal-IPC Symposium at Tahoe City,
Cal-IPC demonstrated the beta version of
a quad-level online atlas of wildland weed
distribution based on data from various sources including
local expert knowledge.
Calflora has been working closely with Cal-IPC since 2010 to
collect weed observation data for CalWeedMapper.
If you are working on weeds for a county or
weed management area, CalWeedMapper
will suggest which weeds are the important targets in your area,
and produce documentation that can help secure funding
for surveillance, eradication and containment efforts.
Metadata Catalog / GIS Data Upload to upload GIS datasets (shapefiles, geodatabases, spreadsheets etc.)
for assimilation into the database.
(Note: this is the simplest way to share your data!)
Observation Upload to upload an entire dataset directly into the database
by copying and pasting, for instance, from a spreadsheet.
During the upload process, you assign
fields in the dataset being uploaded
to fields in the Calflora database.
For line and polygon shapefiles, the geometries are stored
on the server and associated with your uploaded records.
Observation Hotline application can show what
weed observations people have been contributing recently, on a map with photos:
Methods of Searching for Weed Records and
Analyzing Weed Distribution
Plant Distribution Grid
shows the statewide distribution of a plant
as a variable cell size grid, or as points.
Taxon Report page for a particular plant,
press the Distribution Grid link.
The cells are colored to make a heat map, indicating
where a particular plant has been observed the most.
Dittrichia graveolens in the Bay Area.
This application can show shape data (lines and polygons) when available.
this plant list
to see which plants have shape data.
See also the
Help Page for Plant Distribution)
The grid is an interesting way to bring point data and shape data
together on the same map, at whatever scale.