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CPAD 2016b and CCED 2016 have been updated

Since our December release of CPAD and CCED, we made corrections and updates to both datasets that we wanted to make available ASAP.

Some of these updates we discovered or planned, but some were brought to our attention by users. We love hearing from you, even if (especially if) it's to point out mistakes! Contact us at cpad@calands.org

Read on for more details and download links.

Updates to CCED 2016


The 2016 release of CCED was a substantial improvement in the effort to track easements in California. The following are further improvements made since the December release.

What we updated: 
  • Completion of the CCED_ID field - All easements now have a CCED identifier. In most cases this value is unique. The field uses the 2015 CCED_ID when available, or a new value has been generated for new easements in the database. Because some 2015 easements are now defined by multiple polygons in 2016 a CCED_ID may be used multiple times. Future releases will work to refine the tracking of easements over time, should funding allow.
  • NCED_UID - Similarly, the NCED_UID has been populated for roughly 25% of the database (36% of total acres, 15% easement records). Users should note that the geometry and attributes between NCED 2016 and CCED may differ significantly, but comparisons between site names, easement holders, and locations suggested matching easements. The changes are often believed to be due to data improvements. We hope to increase the match rate between the datasets significantly in the next release.
  • Metadata - We have updated and included metadata for the 2016 release of CCED.
  • Data corrections - In a handful of cases we have made easement-specific edits to correct errors.
Download CCED 2016

Corrections to CPAD 2016b


Thank you to CPAD users for alerting us to the following issues!

What we corrected: 
  • Geometry errors - There were a number of self-intersections at the Holdings level that made certain clipping and other geoprocessing tasks impossible. These issues have been corrected. 
  • Mixed-up Unit IDs - If you were working with CPAD in Santa Cruz County, you may have been surprised to find an Anza-Borrego Desert State Park unit nestled next to Ano Nuevo State Park. That was a mistake! It has now been corrected. 
  • LAND_WATER field - We found a handful of Holdings with no value for this field, and one instance of land being mis-assigned as water. 
Download CPAD 2016b

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More to say about CPAD?

Tweet us @greeninfo! Or email us at cpad@calands.org. There are live human beings behind this data who are interested to hear what you have to say. How are you using CPAD and CCED? What needs improvement? 
The California Protected Areas Database (CPAD) is a GIS inventory of lands protected primarily for open space uses through fee ownership by federal, state, regional/local agencies, and by private conservation organizations. Some lands in CPAD may be subject to transfer or disposition for other non-resource uses over time, and some may have restricted public access. The first version of CPAD was released in May 2008.

The California Conservation Easement Database (CCED) contains lands protected under conservation easements. It is a parallel data set to CPAD which covers protected areas owned in fee. The first version of CCED was released in April 2014. 

To learn more, please visit calands.org

 
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