BDB Programs
CNDDB Links
Biogeographic Data Branch
1807 13th Street, Suite 202
Sacramento, CA 95811
(916) 322-2493
Comparison of CNDDB and BIOS
CNDDB and BIOS - Complementary Systems
| California Natural Diversity Database (CNDDB) | Biogeographic Information and Observation System (BIOS) | |
| Data | Rare species and communities only | Any environmental/biological information with a spatial component |
| Source Materials | Raw source materials are preserved, tracked, and available at DFG | Raw source materials remain with the contributor |
| Data Layer | Single layer; records within the layer are aggregations of information from numerous data sources including field survey forms, specimens, environmental documents, published literature | Multiple layers; records within each layer are from a single data contributor |
| Data Format | All records are in a standardized format, facilitating comparisons of data from varying data sources | Data layers are non-standardized (using different scales, methods, details, etc.) making comparisons among layers potentially difficult. |
| Quality Control | All data are extensively examined to ensure accuracy of output | Contributor is responsible for accuracy of data; data are examined for consistency, clarity, and adherance to general format. |
| Metadata | Extensive metadata developed and maintained by CNDDB staff | Layer-specific metadata provided by contributor using a standard format |
| Data Processing | Data are prioritized and available after processing and quality control | Data are available quickly after minimal processing |
| Update Frequency | Continuously | Variably |
| Crossover | CNDDB spatial data appear in BIOS as a layer | Appropriate rare species data from BIOS are incorporated into CNDDB |
| Support | Contact CNDDB staff | Contact data contributor indicated in metadata |
| Public Availability | Products are licensed from DFG and exempt from FOIA and PRA requests | Products are subject to FOIA and PRA requests |
FOIA = Freedom of Information Act
PRA = California Public Records Act
DFG = California Department of Fish and Game