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  1. Title: Plano de Yerba Buena, Alta California (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced image of a site plan Plano de Yerba Buena, Alta California. For descr. see: Harlow, N. The Maps of San Francisco Bay ... 1850, no. 31.Pen-and-ink and watercolor on tracing paper.Oriented with north to right."No. 280, City of San Francisco, San Francisco, Exhibit no. 2 A.F., filed in office Aug. 20, 1853, Geo. Fisher." Shows drainage, settlements, etc. Relief shown pictorially. A scanned version of this map was georeferenced as part of the Imagined San Francisco project. This project traces the history of urban planning in San Francisco, placing special emphasis on unrealized schemes. Rather than using visual material simply to illustrate outcomes, Imagined San Francisco uses historical plans, maps, architectural renderings, and photographs to show what might have been. By enabling users to layer a series of urban plans, the project presents the city not only as a sequence of material changes, but also as a contingent process and a battleground for political power. Savvy institutional actors--like banks, developers, and many public officials--understood that in some cases to clearly articulate their interests would be to invite challenges. That means that textual sources like newspapers and municipal reports are limited in what they can tell researchers about the shape of political power. Urban plans, however, often speak volumes about interests and dynamics upon which textual sources remain silent. Mortgage lenders, for example, apparently thought it unwise to state that they wished to see a poor neighborhood cleared, to be replaced with a freeway onramp. Yet visual analysis of planning proposals makes that interest plain. So in the process of showing how the city might have looked, Imagined San Francisco also shows how political power actually was negotiated and exercised. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

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  2. Title: Juvenile Delinquents, Washington, D.C., 1935 (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced raster image of the historic paper map entitled: Spot map showing residences of juvenile delinquents in the District of Columbia as of July 1, 1935. Data furnished by Juvenile Court of the District of Columbia. It was published in 1936. Scale [ca. 1:19,200]. Base map 'Complete to June 13, 1933.' The image inside the map neatline is georeferenced to the surface of the earth and fit to the Maryland State Plane Coordinate System Meters NAD83 (Fipszone 1900). 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 location of juvenile delinquents' residences by race and sex. Shows also features such as block numbers and alley dwelling areas, roads, railroads and stations, drainage, selected public buildings and points of interest, parks, cemeteries, 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.

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  3. Title: MassGIS 2000 Massachusetts Senate Legislative Districts (1993)

    Contributors:

    Summary: The Massachusetts State Senate Legislative Districts (1993) datalayer reflects the State Senate district boundaries as defined by Chapter 274 of the Acts of 1993. The name of the statewide datalayer is SENATE93. Names of elected officials are up-to-date through March 1997.

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  4. Title: Deschutes National Forest, Oregon

    Contributors:

    Summary: Relief shown by hachures and spot heights.; "Willamette meridian."; Panel title: Map of Deschutes National Forest and directions to tourists and campers.; Includes text (11 panels) and table of distances on verso. 85 x 52 centimeters Scale approximately 1:253,440 General Map Collection

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  5. Title: Boston, Massachusetts, proposed tide mills, 1814 (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced raster image of the historic paper map entitled: A plan of those parts of Boston and the towns in its vicinity : with the waters and flats adjacent which are immediately or remotely connected with the contemplated design of erecting perpetual tide-mills, published by Benjamin Dearborn, 1814. It was originally issued with Massachusetts House Document no. 18 of June 1814 -- petitions to incorporate Boston and Roxbury Mill Corp. Scale [1:15,840]. Covers portions of Boston, Brookline, Cambridge, and Somerville. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Massachusetts State Plane Coordinate System, Mainland Zone (in Feet) (Fipszone 2001). 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 shows features such as selected roads (existing and proposed), propsosed tide mills and dams, drainage, canals, bridges, and more. This layer is part of a selection of digitally scanned and georeferenced historic maps of Massachusetts from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates (1755-1922), scales, and purposes. The digitized selection includes maps of: the state, Massachusetts counties, town surveys, coastal features, real property, parks, cemeteries, railroads, roads, public works projects, etc.

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  6. Title: Kano

    Contributors:

    Summary: Relief shown by rock drawings. Map includes "Reliability diagram" and "Index to adjoining sheets." Map shows administrative boundaries; roads and railroads; footpaths; compounds and buildings (some identified), walls, fences, and hedges around them; wells, springs and water tanks; bridges and culverts; town walls; orchards; quarries and pits; benchmarks with their corresponding elevations; outcrops; steep slopes and cliffs; marshes and bodies of water; and other features. Printed and published by Federal Surveys, Nigeria, 1959. 550/1015/11-59.

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  7. Title: Greater Kano

    Contributors:

    Summary: Map is two sheets joined to form one map. Plan no. TPO.650. Copy two has field notes.

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  8. Title: St. Louis County, Minnesota official highway map of main state, county and township highway routes

    Contributors:

    Summary: Cartographic Details: Scale not given. "Compliments of.."--top margin above neat line. 79 x 36 centimeters Scale not given. Minnesota County Maps, Plat Books, and Atlases

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  9. Title: Industries, Northern Rhodesia

    Contributors:

    Summary: Map shows cities, motor roads, railways, and areas and primary products of mining, agricultural, and sawmill production. Original map is filed in the Map and Geospatial Information Center. A map reproduction is attached to companion volume.

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  10. Title: Population, Northern Rhodesia

    Contributors:

    Summary: Map shows population density, in individuals per square mile, and percentage of absentees among able-bodied males for each district. Areas of tsetse fly presence are also shown. Original map is filed in the Map and Geospatial Information Center. A map reproduction is attached to companion volume. Crown copyright reserved. Map is number 2.

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  11. Title: Northern Rhodesia, shewing native reserves and tribal areas

    Contributors:

    Summary: Map shows names and boundaries of tribal areas, tribal populations, and extent of native reserve areas. Includes list of total inhabitants by provinces, and table showing total number of tribes in each province. "(Note: 61 tribes numbering less than 20,000 each are ommitted)." Original map is filed in the Map and Geospatial Information Center. A map reproduction is attached to companion volume. Crown copyright reserved. "(3879)" Map is number 3. Map shows names and boundaries of tribal areas, and extent of native reserve areas. Includes tables showing total inhabitants of provinces and numbers of principal tribes in each province.

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  12. Title: Population, Northern Rhodesia

    Contributors:

    Summary: Map shows population density, in individuals per square mile, and percentage of absentees among able-bodied males for each district. Areas of tsetse fly presence are also shown. Original map is filed in the Map and Geospatial Information Center. A map reproduction is attached to companion volume. Crown copyright reserved. Map is number 2.

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  13. Title: Map showing lands belonging to the Northern Pacific Railroad Co. in ... North Dakota

    Contributors:

    Summary: The shaded sections indicate Railroad Lands for sale. Map corrected to June 1st, 1893.; "Compiled and drawn by A.J. Pray." 86 x 67 centimeters No scale given. General Map Collection

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  14. Title: LiDAR-Derived Digital Surface Model (DSM) for Milwaukee County and the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents a LiDAR-derived digital surface model (DSM) for the Milwaukee Metropolitan Sewerage District (MMSD), Wisconsin in 2021. A Digital Surface Model captures both the natural and built/artificial features of the environment.

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  15. Title: LiDAR-Derived Hydro-Enforced DEM for Milwaukee County and the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents a LiDAR-derived hydro-enforced Digital Elevation Model (DEM) for the Milwaukee Metropolitan Sewerage District (MMSD), Wisconsin in 2021. This dataset contains a single file covering the geographic extent of the entire county.

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  16. Title: LiDAR-Derived Culverts (Lines) for Milwaukee County and the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents LiDAR-derived culverts (lines) for the Milwaukee Metropolitan Sewerage District (MMSD) in 2021. [3D culvert lines and points were generated from lidar bare earth DEM's and 2020 WROC 12 inch stereoimagery. During extraction a degree of user interpretation was necessary in determining culverts versus other similar cultural features. The Lidar base project DEM will be hydro flattened but not hydro-enforced which is typically used on water and flood modeling. To hydro enforce the DEM, we will collect culvert locations across the county. These culvert lines will then be draped to the Lidar point cloud, and the lowest elevation will be applied to the line. We will use the resulting 3D breakline to reclassify the ground points and cut the DEM, allowing water to flow through the culverts, rather than dam against the road bank. This is useful for hydro modeling and land conservation planning across the county.]

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  17. Title: LiDAR-Derived Bare Earth DEM for Milwaukee County and the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents a LiDAR-derived bare earth Digital Elevation Model (DEM) for the Milwaukee Metropolitan Sewerage District (MMSD), Wisconsin in 2021. This dataset contains a single file covering the geographic extent of the entire county.

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  18. Title: LiDAR-Derived Breaklines for Milwaukee County and the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents LiDAR-derived breaklines for the Milwaukee Metropolitan Sewerage District (MMSD) in 2021. Hydro breaklines maintain the definition of water-related features in an elevation model. They are used to capture linear discontinuities in the surface, lake shorelines, single-line drains for small rivers, and double-line drains for large rivers.

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  19. Title: LiDAR-Derived Tiled DSM for Milwaukee County and the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents LiDAR-derived tiled digital surface model (DSM) for the Milwaukee Metropolitan Sewerage District (MMSD) (covering all of Milwaukee County) Wisconsin in 2021. A Digital Surface Model captures both the natural and built/artificial features of the environment.

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  20. Title: LiDAR-Derived Depressions for Milwaukee County and the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents LiDAR-derived depressions for the Milwaukee Metropolitan Sewerage District (MMSD) in 2021. [Closed depressions are important features in the landscape and knowing their locations aid in the understanding of topics ranging from water recharge to water quality and flooding. A series of automated routines were used to map closed depressions over 0.1 acres in size throughout Milwaukee County. The 2021 culvert inventory and 2021 hydro-enforced DEM were used to develop the closed depressions. ArcGIS Pro with Spatial Analyst Extension software was utilized to extract depressions from the hydro-enforced DEM. The initial step was to create a raster with filled depressions from the hydro-enforced DEM. The filled raster was then combined with the original DEM using a maximum operator creating a mosaic raster. The mosaic raster accounts for all depressions, but eliminates digital trenches located at culvert locations from the hydro-enforced DEM. The original DEM was then subtracted from the mosaic raster to extract depressions. Depression depths greater than 1 inch were then extracted. The greater than 1 inch depth raster was used to convert depression areas to polygons. Polygons greater than 0.1 acres were selected for the final closed depression dataset. The layer is intended to represent the greatest extent of individual surface depressions regardless of the degree of drainage at each setting. The depressions file can be shaded to show depth. A low elevation point layer was created for each depression and includes a depth value at the low point. A boundary polygon shapefile of closed depressions was generated including an acreage value. Closed depression mapping is influenced by project boundaries. Depressions that intersect the edge of the project boundary will either be partially filled to the height of the low point of the depression at the boundary, or not filled at all in cases where depression bottoms are flat and extend beyond the boundary. Lidar collection buffer areas improve the mapping accuracy of depressions within the subject county.]

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