887 results returned
-
Title: Saint Petersburg, 1912 (Raster Image)
- Raster data
- 2019
- Not owned by MIT (Owned by Harvard)
Summary: This layer is a georeferenced raster image of the historic paper map entitled: Plan S. Peterburga ispravlennyi po 1912 g. It was published by: Izdanīe G.F. Knokh in 1912. Scale ca. 1:2,625. Map in Russian. The image inside the map neatline is georeferenced to the surface of the earth and fit to the WGS 1984 UTM Zone 36N (EPSG: 32636) coordinate system. All map features and collar and inset information are shown as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of geographies, originators, ground condition dates, scales, and map purposes.
-
Title: Hannover, ca. 1820 (Raster Image)
- Raster data
- 2019
- Not owned by MIT (Owned by Harvard)
Summary: This layer is a georeferenced raster image of the historic paper map entitled: Hannover. It was published ca. 1820. Scale ca. 1:10,000. Map in German. The image inside the map neatline is georeferenced to the surface of the earth and fit to the WGS 1984 UTM Zone 32N (EPSG: 32632) coordinate system. All map features and collar and inset information are shown as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of geographies, originators, ground condition dates, scales, and map purposes.
-
Title: Africa 1841 (Raster Image)
- Raster data
- 2013
- Not owned by MIT (Owned by Stanford)
Summary: This layer is a georeferenced raster image of an historic continental map of Africa from 1841 originally created by G.F. Crutchley. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map was georeferenced by the Stanford University Geospatial Center using a Sinusoidal projection. This map is part of a selection of digitally scanned and georeferenced historic maps of Africa held at Stanford University Libraries. This historic paper map provides an historical perspective of the cultural and physical landscape during this time period. The wide range of information provided on these maps make them useful in the study of historic geography. As this map has been georeferenced, it also can be used as a background layer in conjunction with other GIS data. The horizontal positional accuracy of a raster image is approximately the same as the accuracy of the published source map. The lack of a greater accuracy is largely the result of the inaccuracies with the original measurements and possible distortions in the original paper map document. There may also be errors introduced during the digitizing and georeferencing process. In most cases, however, errors in the raster image are small compared with sources of error in the original map graphic. The RMS error for this map is 555.644 meters. This value describes how consistent the transformation is between the different control points (links). The RMS error is only an assessment of the accuracy of the transformation. Cruchley, G.F. and Stanford Geospatial Center. (2013). Africa 1841 (Raster Image). Stanford Digital Repository. Available at: http://purl.stanford.edu/vh772td2101. For more information about Stanford's Maps of Africa Collection, see here: https://exhibits.stanford.edu/maps-of-africa. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
-
Title: Africa (Raster Image)
- Raster data
- 2013
- Not owned by MIT (Owned by Stanford)
Summary: This layer is a georeferenced raster image of an historic paper map of Africa. This is a continental map of Africa originally created and published by G.F. Cruchley in 1841. The features illustrated on this map includes: rivers, lakes, and coastal islands. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map was georeferenced by the Stanford University Geospatial Center using a Sinusoidal projection. This map is part of a selection of digitally scanned and georeferenced historic maps of Africa held at Stanford University Libraries. This historic paper map provides an historical perspective of the cultural and physical landscape during this time period. The wide range of information provided on these maps make them useful in the study of historic geography. As this map has been georeferenced, it also can be used as a background layer in conjunction with other GIS data. The horizontal positional accuracy of a raster image is approximately the same as the accuracy of the published source map. The lack of a greater accuracy is largely the result of the inaccuracies with the original measurements and possible distortions in the original paper map document. There may also be errors introduced during the digitizing and georeferencing process. In most cases, however, errors in the raster image are small compared with sources of error in the original map graphic. The RMS error for this map is 1679.13 meters. This value describes how consistent the transformation is between the different control points (links). The RMS error is only an assessment of the accuracy of the transformation. Cruchley, G.F. and Stanford Geospatial Center. (2013) Africa (Raster Image). Stanford Digital Repository. Available at: http://purl.stanford.edu/vr426sf1153. For more information about Stanford's Maps of Africa Collection, see here: https://exhibits.stanford.edu/maps-of-africa. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
-
Title: England and Wales, 1863 (Raster Image)
- Raster data
- 2011
- Not owned by MIT (Owned by Harvard)
Summary: This layer is a georeferenced raster image of the historic paper map entitled: Cruchley's travellers companion through England and Wales, shewing the railways and stations to the present time. It was published by G.F. Cruchley in 1863. Scale [ca. 1:950,400]. Covers also Isle of Man and shoreline of Northern Ireland.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Europe Lambert Conformal Conic coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, roads, railroads, ferry lines, telegraph lines, shoreline features, and more.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.
-
Title: Strasbourg, France, 1823 (Raster Image)
- Raster data
- 2010
- Not owned by MIT (Owned by Harvard)
- Harvard Map Collection, Harvard College Library
- Rothe, Ch.
- Levrault, F. G.
- Senefelder, Clem.
- Villot, N. J.
Summary: This layer is a georeferenced raster image of the historic paper map entitled: Plan de Strasbourg : avec tous les etablissmens publics renfermes dans l'enceinte des fortifications, reduit par Ch. Rothe sur le plan general dresse en 1821 par Mr. N. J. Villot, architecte de la ville ; dessine et ecrit sur pierre par Clement Senefelder. It was published by la lithographie de F. G. Levrault, imprimeur du Roi in 1823. Scale [1:3,126]. Covers Strasbourg, France. Map in French. The image inside the map neatline is georeferenced to the surface of the earth and fit to the 'European Datum 1950 UTM Zone 32N' coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as roads, drainage, built-up areas and selected buildings, fortification, ground cover, and more. This layer is part of a selection of digitally scanned and georeferenced historic maps from The Harvard Map Collection as part of the Imaging the Urban Environment project. Maps selected for this project represent major urban areas and cities of the world, at various time periods. These maps typically portray both natural and manmade features at a large scale. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.
-
Title: Cruchley's reduced ordnance map of London : with 4000 street references and what to see
- Not specified
- 1870
- Not owned by MIT (Owned by University of Minnesota)
Summary: Shows detached buildings and areas covered by contiguous buildings.; Cover title.; Title at top: Reduced ordnance map of London. 67 x 89 centimeters Scale approximately 1:12,600 City Maps
-
Title: Reduced ordnance map of London
- Image data
- 1869
- Not owned by MIT (Owned by Princeton)
Summary: Relief shown by hachures. Originally issued folded, in covers, with cover title: Cruchley's reduced ordnance map of London.
-
Title: Appletons' railway map of the United States and the Canadas : representing railways in actual operation, and those in course of construction, also map of the territories, showing the Pacific Railroad, gold regions, &c.
- Not specified
- 1864
- Not owned by MIT (Owned by University of Minnesota)
Summary: Relief shown by hachures.; Prime meridian: Washington, D.C.; Inset: [Western United States].; Advertisements and ancillary map: Map of Illinois Central Railway and connections, on verso. 54 x 69 centimeters Scale approximately 1:3,600,000 General Map Collection
-
Title: Cruchley's new postal district map of London
- Image data
- 1857
- Not owned by MIT (Owned by Princeton)
Summary: "Additions to 1857." Shows London divided into ten postal districts.
-
Title: France
- Image data
- 1847
- Not owned by MIT (Owned by Princeton)
Summary: Relief shown by hachures. Inset: Corsica. "Published January 1st 1847." Originally issued folded in covers 17 x 12 cm.
-
Title: Cruchley's new plan of London: shewing all the new and intended improvements to the present time.; Cruchley's new plan of London with the East and West India docks, improved to 1844: coloured to show the various routes of the omnibus [wds obscured] a table of reference to upwards of [wds. obscured] principal streets, squares [wds. obscured], public buildings, etc. with the railways and stations
- Not specified
- 1843
- Not owned by MIT (Owned by University of Michigan)
Summary: In slide box. Includes indexes. In lower left: a new edition improved to Jany. 1st 1843. 1 map: col., dissected and mounted on canvas; 38 x 79 cm., folded in box 15 x 9 cm.
-
Title: Cruchley's new plan of London : shewing all the new and intended improvements to the present time.
- Not specified
- 1837
- Not owned by MIT (Owned by University of Minnesota)
Summary: Scale: approximately 4 in. to 1 mile. 42 x 61 centimeters Scale approximately 1:15,500. Approximately 4 inch to 1 mile City Maps
-
Title: Cruchley's new plan of London : improved to 1832.
- Not specified
- 1832
- Not owned by MIT (Owned by University of Minnesota)
Summary: Map is hand-colored. 55 x 140 centimeters Scale approximately 1:12,672 City Maps
-
Title: Survey of the Mississippi River : Lake Itasca basin, Minnesota, within Itasca State Park
- Not specified
- 1900
- Not owned by MIT (Owned by University of Minnesota)
- Clark, C. W. (Engineer)
- Comber, W. G.
- D'Ailly, H. A. H.
- French, G. H. (Surveyor)
- Harmon, E. L. (Surveyor)
- Julius Bien & Co.
- Morrow, A. T.
- Ray, F. G.
- United States. Mississippi River Commission
- Widen, K. A.
- Williams, W. S. (Cartographer)
- Wolbrecht, Geo. H.
Summary: Cartographic Details: Scale 1:15,000 ; Trigonometrical projection ; (W 95°15'20"--W 95°09'00"/N 47°15'00"--N 47°08'10"). Relief shown by contours. Depths shown by soundings. Oriented with north to right. " ... Topography by W.G. Comber, G.H. French and F.G. Ray. Hydrography by W.G. Comber. Office reduction, under the direction of C.W. Clark ... by A.T. Morrow, W.G. Comber, G.H. French, E.L. Harman, W.S. Williams, F.G. Ray, and Geo. H. Wolbrecht. Drawing, under the direction of C.W. Clark ... by K.A. Widen and H.A.H. d'Ailly." Includes text. 57 x 92 centimeters 1:15,000 General Minnesota Maps
-
Title: Map of Minnesota
- Not specified
- 1925
- Not owned by MIT (Owned by University of Minnesota)
Summary: State lands for sale in 1926 indicated in red.; "In each township marked with a red dot the state is offering for sale, at public auction, various tracts of state-owned land."; Insets: Mesabi Range. Scale [1:633,600] -- Cook County, northeastern Minnesota -- St. Paul-Minneapolis and vicinity. Scale [approximately 1:490,000].; On verso: Minnesota, land of golden opportunity. Includes nine ill. and text describing the land and terms of sale. 72 x 51 centimeters Scale approximately 1:950,000 General Minnesota Maps
-
Title: Sediment Thickness: Salt Point to Drakes Bay, California, 2009
- Raster data
- 2014
- Not owned by MIT (Owned by Stanford)
- Sliter, Ray W.
- Hartwell, Stephen R.
- Watt, Janet T.
- Johnson, Samuel Y.
- Pacific Coastal and Marine Science Center
Summary: This layer is a georeferenced raster image containing sediment-thickness data for the areas within the 3-nautical mile limit between Salt Point and Drakes Bay, in California. As part of the USGS's California State Waters Mapping Project, a 50 meter grid of sediment thickness for the seafloor within the 3-nautical mile limit was generated from seismic-reflection data collected in 2009. The resulting grid covers an area of approximately 717 sq km. The volume of sediment accumulated since the Last Glacial Maximum is approximately 6,800 million cubic meters. Contours at 2.5-meter intervals were derived from this grid. This layer is part of USGS Data Series 781. In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP) to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats and geology within the 3-nautical-mile limit of California's State Waters. CSMP has divided coastal California into 110 map blocks, each to be published individually as United States Geological Survey Open-File Reports (OFRs) or Scientific Investigations Maps (SIMs) at a scale of 1:24,000. Maps display seafloor morphology and character, identify potential marine benthic habitats and illustrate both the seafloor geology and shallow (to about 100 m) subsurface geology. Data layers for bathymetry, bathymetric contours, acoustic backscatter, seafloor character, potential benthic habitat and offshore geology were created for each map block, as well as regional-scale data layers for sediment thickness, depth to transition, transgressive contours, isopachs, predicted distributions of benthic macro-invertebrates and visual observations of benthic habitat from video cruises over the entire state. These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes.The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information. Johnson, S.Y., Hartwell, S.R., Watt, J.T., and Sliter, R.W. (2014). Sediment Thickness: Salt Point to Drakes Bay, California, 2009. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/nk085bf7278. Sediment thickness and volume within each of the map areas > Salt Point 38.639622 38.479620 -123.482704 -123.278809 > Fort Ross 38.556494 38.396794 -123.305678 -123.102404 > Bodega Bay 38.411542 38.252067 -123.172536 -122.969899 > Tomales Point 38.255180 38.095716 -123.097226 -122.895023 > Point Reyes 38.098263 37.938810 -123.094511 -122.892742 > Drakes Bay 38.038192 37.878737 -122.966411 -122.764735 > > -----sediment thickness-------- > Area Volume > Map block (sq km) Mean (million cu m) > Salt Point 117 12.5 1464 > Fort Ross 100 21.5 2157 > Bodega Bay 128 8.5 1084 > Tomales Point 108 2.1 230 > Point Reyes 175 7.9 1387 > Drakes Bay 89 5.3 476 Additional information about the field activities from which this data set was derived are available online at > http://walrus.wr.usgs.gov/infobank/s/s809nc/html/s-8-09-nc.meta.html Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
-
Title: Transgressive Contours: Salt Point to Drakes Bay, California, 2009
- Line data
- 2014
- Not owned by MIT (Owned by Stanford)
- Watt, Janet T.
- Hartwell, Stephen R.
- Johnson, Samuel Y.
- Sliter, Ray W.
- Pacific Coastal and Marine Science Center
Summary: This line shapefile contains transgressive contours at 5 and 10 meter intervals for the area within the 3-nautical mile limit between Salt Point and Drakes Bay in California. As part of the USGS's California State Waters Mapping Project, a 20-m grid of depth to the transgressive surface of the last glacial maximum was generated for the 3-mile offshore region. The resulting grid covers an area of approximately 550 sq km. The depth to the transgressive surface of the Last Glacial Maximum ranges between 0 and 102 meters. This layer is part of USGS Data Series 781. In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP) to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats and geology within the 3-nautical-mile limit of California's State Waters. CSMP has divided coastal California into 110 map blocks, each to be published individually as United States Geological Survey Open-File Reports (OFRs) or Scientific Investigations Maps (SIMs) at a scale of 1:24,000. Maps display seafloor morphology and character, identify potential marine benthic habitats and illustrate both the seafloor geology and shallow (to about 100 m) subsurface geology. Data layers for bathymetry, bathymetric contours, acoustic backscatter, seafloor character, potential benthic habitat and offshore geology were created for each map block, as well as regional-scale data layers for sediment thickness, depth to transition, transgressive contours, isopachs, predicted distributions of benthic macro-invertebrates and visual observations of benthic habitat from video cruises over the entire state. These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes.The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information. Johnson, S.Y., Hartwell, S.R., Watt, J.T., and Sliter, R.W. (2014). Transgressive Contours: Salt Point to Drakes Bay, California, 2009. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/mx615hn8123. Sediment thickness and volume within each of the map areas > Salt Point 38.639622 38.479620 -123.482704 -123.278809 > Fort Ross 38.556494 38.396794 -123.305678 -123.102404 > Bodega Bay 38.411542 38.252067 -123.172536 -122.969899 > Tomales Point 38.255180 38.095716 -123.097226 -122.895023 > Point Reyes 38.098263 37.938810 -123.094511 -122.892742 > Drakes Bay 38.038192 37.878737 -122.966411 -122.764735 > depth to transgressive surface > Area > Map block (sq km) MIN MAX MEAN STD > Salt Point 117 -110.0 -0.2 -82.8 21.7 > Fort Ross 100 -102.1 0.0 -65.6 26.0 > Bodega Bay 128 -100.7 2.2 -52.2 28.3 > Tomales Point 108 -86.5 -4.4 -49.2 19.5 > Point Reyes 175 -89.5 -0.1 -52.1 22.7 > Drakes Bay 89 -75.8 -1.1 -38.0 12.2 Additional information about the field activities from which this data set was derived are available online at > http://walrus.wr.usgs.gov/infobank/s/s809nc/html/s-8-09-nc.meta.html Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
-
Title: Isopachs: Salt Point to Drakes Bay, California, 2009
- Line data
- 2014
- Not owned by MIT (Owned by Stanford)
- Watt, Janet T.
- Hartwell, Stephen R.
- Johnson, Samuel Y.
- Sliter, Ray W.
- Pacific Coastal and Marine Science Center
Summary: This line shapefile contains isopachs (contour lines of equal thickness) for the areas within the 3-nautical mile limit between Salt Point and Drakes Bay in California. As part of the USGS's California State Waters Mapping Project, a 20-m grid of depth to the transgressive surface of the last glacial maximum was generated for the 3-mile offshore region. The resulting grid covers an area of approximately 600 sq km. The volume of sediment accumulated since the Last Glacial Maximum is approximately 9,000 million cubic meters. Contours at 2.5-meter intervals were derived from this grid. This layer is part of USGS Data Series 781. In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP) to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats and geology within the 3-nautical-mile limit of California's State Waters. CSMP has divided coastal California into 110 map blocks, each to be published individually as United States Geological Survey Open-File Reports (OFRs) or Scientific Investigations Maps (SIMs) at a scale of 1:24,000. Maps display seafloor morphology and character, identify potential marine benthic habitats and illustrate both the seafloor geology and shallow (to about 100 m) subsurface geology. Data layers for bathymetry, bathymetric contours, acoustic backscatter, seafloor character, potential benthic habitat and offshore geology were created for each map block, as well as regional-scale data layers for sediment thickness, depth to transition, transgressive contours, isopachs, predicted distributions of benthic macro-invertebrates and visual observations of benthic habitat from video cruises over the entire state. These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes.The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information. Johnson, S.Y., Hartwell, S.R., Watt, J.T., and Sliter, R.W. (2014). Isopachs: Salt Point to Drakes Bay, California, 2009. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/yf846vt5234. Sediment thickness and volume within each of the map areas > Salt Point 38.639622 38.479620 -123.482704 -123.278809 > Fort Ross 38.556494 38.396794 -123.305678 -123.102404 > Bodega Bay 38.411542 38.252067 -123.172536 -122.969899 > Tomales Point 38.255180 38.095716 -123.097226 -122.895023 > Point Reyes 38.098263 37.938810 -123.094511 -122.892742 > Drakes Bay 38.038192 37.878737 -122.966411 -122.764735 > > -----sediment thickness-------- > Area Volume > Map block (sq km) Mean (million cu m) > Salt Point 117 12.5 1464 > Fort Ross 100 21.5 2157 > Bodega Bay 128 8.5 1084 > Tomales Point 108 2.1 230 > Point Reyes 175 7.9 1387 > Drakes Bay 89 5.3 476 Additional information about the field activities from which this data set was derived are available online at > http://walrus.wr.usgs.gov/infobank/s/s809nc/html/s-8-09-nc.meta.html Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
-
Title: Depth to Transition: Salt Point to Drake's Bay, California, 2009
- Raster data
- 2014
- Not owned by MIT (Owned by Stanford)
- Chin, John L.
- Johnson, Samuel Y.
- Ross, Stephanie L.
- Sliter, Ray W.
- Pacific Coastal and Marine Science Center
Summary: This layer is a georeferenced raster image of the depth to transition (base) map of uppermost Pleistocene and Holocene sediments in the region of Salt Point to Drakes Bay in California. As part of the USGS's California State Waters Mapping Project, a 20-m grid of depth to the transgressive surface of the last glacial maximum (LGM) was generated for the areas within the 3-nautical mile limit between Bolinas and Pescadero. Information for the depth to base of the post-LGM unit was generated by adding sediment thickness data to water depths determined by multibeam bathymetry. The resulting grid covers an area of approximately 550 sq km. The depth to the transgressive surface of the LGM ranges between 4 and 78 meters. This layer is part of USGS Data Series 781. In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP) to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats and geology within the 3-nautical-mile limit of California's State Waters. CSMP has divided coastal California into 110 map blocks, each to be published individually as United States Geological Survey Open-File Reports (OFRs) or Scientific Investigations Maps (SIMs) at a scale of 1:24,000. Maps display seafloor morphology and character, identify potential marine benthic habitats and illustrate both the seafloor geology and shallow (to about 100 m) subsurface geology. Data layers for bathymetry, bathymetric contours, acoustic backscatter, seafloor character, potential benthic habitat and offshore geology were created for each map block, as well as regional-scale data layers for sediment thickness, depth to transition, transgressive contours, isopachs, predicted distributions of benthic macro-invertebrates and visual observations of benthic habitat from video cruises over the entire state. These data are intended for science researchers, students, policy makers, and the general public. This information is not intended for navigational purposes.The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information. Johnson, S.Y., Hartwell, S.R., Watt, J.T., and Sliter, R.W. (2014). Depth to Transition: Salt Point to Drake's Bay, California, 2009. California State Waters Map Series Data Catalog: U.S. Geological Survey Data Series 781. Available at: http://purl.stanford.edu/ys659mz1893. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.