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This is a Non-Federal dataset covered by different Terms of Use than

ACE Irreplaceability (Rank 4 & 5)

Metadata Updated: May 14, 2024

The full Terrestrial Irreplaceability dataset is part of the Areas of Conservation Emphasis (ACE) project from CA Department of Fish and Wildlife (CDFW). ACE Terrestrial Irreplaceability provides a measure of the relative importance of an area based on the number of California endemic, special-status species found there, and the breadth of their distribution, so that species which are more geographically constrained produce a higher score. This geographic weighting system makes a site more ‘irreplaceable’ because it supports species which are found in fewer locations. Rare endemic species are identified by the California Species of Special Concern reports, the California Rare Plant Rank 1B plants, State or Federally-listed species (threatened, endangered, or candidate species), and fully-protected species. 

Ranks 4 and 5 are used as an exclusion in the biological planning priorities component of the Core and SB 100 Terrestrial Climate Resilience Study Screens. This ensures that areas of technical resource potential identified through screening avoid lands with higher conservation value for irreplaceability.This layer is featured in the CEC 2023 Land-Use Screens for Electric System Planning data viewer. 

For more information about this layer and its use in electric system planning, please refer to the Land Use Screens Staff Report in the CEC Energy Planning Library. 

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than License: No license information was provided.

Downloads & Resources


Metadata Created Date August 12, 2023
Metadata Updated Date May 14, 2024

Metadata Source

Harvested from State of California

Additional Metadata

Resource Type Dataset
Metadata Created Date August 12, 2023
Metadata Updated Date May 14, 2024
Publisher California Energy Commission
Identifier 1d0637eb-3320-41eb-a693-6addcd715058
Data First Published 2023-03-01T00:57:27.000Z
Data Last Modified 2023-03-06T22:10:28.290Z
Category Natural Resources
Public Access Level public
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 15c6d443-ba33-4d44-b48e-ce1580aded44
Harvest Source Id 3ba8a0c1-5dc2-4897-940f-81922d3cf8bc
Harvest Source Title State of California
Source Datajson Identifier True
Source Hash 27922432f3f6c5fcdc5de8ae80a0b9e0b6bb7376fc090dcba82f7e6f4f670f01
Source Schema Version 1.1

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