Data is available as services, downloads by watershed (see webmap below), and other means. See the table below for a summary of data products and current download options by product. Please also visit our map gallery, which is automatically updated as we add services and maps to ArcGIS.com. Thanks to Sonoma County ISD and the Ag. Preservation and Open Space District for hosting services!
If you are looking to download contours for a project area less than 500 acres, use the Contour Clip and Email Tool. If you are looking to download imagery for a project area less than 500 acres, use the Image Clip and Email Tool.
LiDAR Products and Derivatives
LiDAR Derived Hydrologic Data Products
|Data Product||Data Product Location or Endpoint|
|Vector Hydro Data Products (stream centerlines, confluence points & watersheds)||Countywide Geodatabase (.gdb), Watershed Downloads|
|Raster Hydro Data Products (hydroenforced DEM, flow accumulation, flow direction)||Watershed Downloads|
Vegetation and Land Cover Map Products
2017 Fire Related Products
|Data Product||Data Product Location or Endpoint|
|June 2018 Imagery of 2017 North Bay Fire Perimeters||Image Service (ArcGIS.com page), TIFFs for each fire perimeter|
|Revised 2017 Sonoma County Fire-Perimeters||File Geodatabase|
|Canopy Damage Maps||Countywide Geodatabase (.gdb), Feature Service, Canopy Damage Product Datasheet|
|Ladder Fuels||Image Service - Classified Ladder Fuels, Tiff - Classified Ladder Fuels, Image Service - Raw Ladder Fuels, Tiff - Raw Ladder Fuels,Ladder Fuels Product Datasheet|
|Fuel Model||Sonoma County 5-m Fuel Model|
|2017 Fires Story Map||Story Map|
|Data Product||Data Product Location or Endpoint|
|June 2018 Imagery of 2017 North Bay Fire Perimeters||Image Service (ArcGIS.com page), TIFFs for each fire perimeter"|
|2013 6-inch/pixel Orthos||Service Endpoint, MrSID Compressed Tiles|
|2011 6-inch/pixel Orthos||Service Endpoint, MrSID Compressed Tiles|
|1942 Scanned Imagery - Central Sonoma County||.img File (500 MB), Central Sonoma County Then and Now Viewer|
|Other Image Services from Sonoma County ISD||1993 DOQs, 2000 Imagery, 2004 Imagery, 2007 Imagery, 2008 Imagery, 2009 NAIP Imagery, 2014 NAIP Imagery, 2016 NAIP Imagery, 2018 High Res. Orthophotography|
|USGS Topo Service (1:24K) from Sonoma County ISD||USGS Topos|
If you are interested in downloading DEMs and hillshades for large portions of the county, we have provided 6 large-area rasters for both the bare earth hillshade and the bare earth DEMs. Those tifs are available here. Also, download compressed MrSID files of the 2013 orthos here (use the "2013 County Aerial MrSID Tiles.pdf" to find your tile). The 2011 orthos are also available as MrSID files here.
For more information on countywide image services, see this blog post.
We are also providing access to all LiDAR data (point cloud and all derivatives) for each of the 9 cities in Sonoma County. These downloads include the 2013 4-band orthophotographs as GeoTiffs (except for the City of Santa Rosa). Please click here to download data for a city.
Data is free and publicly available, but please provide credit for these data when you use them in your work. See this text for how to officially acknowledge the sources of this these data. Also, please let us know how you are using the data!
Click a watershed on the interactive map below to download LiDAR data for the watershed (click here for larger version of the webmap). If you are having problems with this webmap try clearing your browser cache or using a different browser.
I'm looking for a LIDAR map that can help me identify old logging roads in the forest area around Black Mountain near Jenner, CA. Can you point me to the map that can help with this?
The hillshades will help you identify roads under canopy. These are provided as geotiffs from sonomavegmap.org/data-downloads. You will need GIS software to use these geotiffs.
Do you have the watershed polygons available for download? I would like to use them for clipping rasters generated from your LiDAR data. Thanks.
you can grab the Lidar derived watersheds here as a file gdb feature class: http://sonomaopenspace.maps.arcgis.com/home/item.html?id=c9f7503b9838497d9bd283b20aeec569
Thankyou, I was able to acquire the polygons.
I am a Ph.D. student from the International Institute for Earth System Science (ESSI) at Nanjing University,P.R.China. By consulting data from Opentopography website, I found out and downloaded some Lidar data and Vegetation and Habitat Map (FileGDB) of Sonoma county.These data providing great support for my research.Thanks for you and your colleagues shared these high-quality and detailed data.Now,I am preparing a paper about my research.It will use small section of overall Lidar data and Vegetation and Habitat Map of Sonoma county.I wonder if you allow me to use these data and vegetation survey data for research and publication.If you permit,I will officially acknowledge the sources of these data in my paper.I'd be look forward to your reply.
Thanks for your message. No problem for to use the data with acknowledgement. Thanks for asking. Best of luck!
How do I decompress laz files to las files?
You can download Lastools at http://www.cs.unc.edu/~isenburg/lastools/
There's an .exe program and an ArcGIS Toolbox to choose from.
Hi, I'm wondering if you or anyone else has created a stream layer from your hydro-flattened DEM? As the NHD stream lines are quite inaccurate, this would be a great service to a number of groups.
Thanks for any information.
We are in the process of preparing a number of hydrologic data products for for public distribution. These will include a stream centerline vector layer, watersheds, flow accumulation and flow direction rasters, and a hydro-enforced DEM. All of these datasets will be derived from the 2013 LiDAR. We hope to have these data products available on this web site in the next two weeks.
It's been more than two weeks, and I can't seem to find the hydrologic data on this site. Is there an updated timeline, or am I looking in the wrong place?
We've asked our contractor to do a second round of revisions on the hydrologic data deliverables. They are in the process of completing the revisions and we expect to have final datasets posted by the end of the month.
Hi Cleo: LiDAR derived stream centerline (thalwags) are now available on the data downloads page of this web site.
Where do I find the building footprint file for Sonoma County?
Here you go Ed:
Any chance the 2013 orthos will be available with a clip tool? It would be great to avoid the SIDS headache. They used to be available in jp2 tiles from the usgs website, but now all they have are 2011 1 meter resolution tiles.
Thanks Jason - this is something we hope to implement in future.
Jason - (if you are still listening!) You can uncompress MrSID imagery using a free tool downloadable from LizardTech. See http://www.lizardtech.com/downloads/category/#tools__utilities
I have used the command line utilities to convert MrSID to georeferenced TIFF.
MrSID can deliver very high compression (40:1) so run the utility on a machine with lots of RAM and enough disk space to hold the decompressed images.
If you use GDAL http://gdal.org/ then you can process MrSID files there too. It requires downloading the MrSID SDK from the above link. Using GDAL would let you take the MrSID file directly into lots of other raster formats. (Currently it supports 138 formats)
Hope this helps -- Brian
The contour clip and email viewer utility does not work properly when producing 2010 .dwg's. The contours do not come in with proper elevation, nor are they indexed properly (i.e. Z=3.67). Will this be resolved?
I would like to use the LiDAR contour data in conjunction with the MrSID Orthophotos, since I am assuming that both are georeferenced. It seems that the MrSID orthophoto is very large (1.2 GB), yet only 1 foot wide when xref'd into autocad. Obviously the image is compressed..... How do I uncompress it to use with countours, and maintain its georeferenced integrity?
Hi Jason: we don't work much in the CAD world over here - we're a pure GIS shop. I wish I had an answer for you. Maybe another engineer or CAD person will chime in with an answer to your question.
Getting "Access Error: 404 -- Not Found" error for endpoints. Hopefully temporary. FYI ~Walter
2013 imagery rest point not functioning today -perhaps some maintenance since the others seem to be fine?
ArcGIS REST Framework
Error: Service Rasters/ORTHO_2013_IS/ImageServer not found
All the great work and data greatly appreciated!!! Excellent use of public & grant monies.
Thanks for your comments Walter. ISD had some issues with the 2013 services yesterday - all should be back up and running now. The endpoint that you want is:
Do you have the point cloud information available in ASCII (P,N,E,Z,D) format?
Hi Ben - thanks for your question. We don't have the point cloud available at this time in ASCII format. However, any day now the Sonoma County LiDAR data will be available on OpenTopography. From OpenTopograpy, you will have the option of downloading the data in ASCII format.
What I am concerned with is being able to differentiate between all of the different points, ground, veg, building, etc. If that information is included in the ASCII file I can filter them based on that.
We are working on a vineyard project that would be perfect for using aerial contours on 18450 Rockpile Road in Geyserville. We tried downloading your contour data and could only get it to open with ArcMap GIS software. We use AutoCad Civil 3d software for our plans. The files we downloaded were very large, around 2gb+ range and in we were wondering what the best way to convert those contours or export them into Autocad software since the file is so large it will crash ArcMap multiple times when trying to do anything. Please let us know if you know of any way of making this data more usable. Thanks!
Thanks Isaiah - the 1 foot contours are a challenge due to their sheer size (as a result of the massive numbers of features). We are working on coming up with a more elegant means of distribution for the contours, in the form of a viewer that allows the user to select a size-limited area of interested and obtain the LiDAR and Ortho products via an email link. We're calling this the "Clip and Email" viewer.
In the meantime, if you email your specific area of interest as a shapefile, kmz, or ESRI feature class, we can clip the contours to just the area that you need and provide you with just this area as .gdb and a shapefile. Hopefully this will be smaller than the entire area of contours that your are trying to work with.