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  1. Title: New Orleans, Louisiana, Water Distribution System, 1902 (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced raster image of the historic paper map entitled: Map of the city of New Orleans : showing proposed water distribution system, [by] Sewerage and Water Board New Orleans, LA.; Geo. G. Earl, genl. sup't. It was published by the Sewerage and Water Board New Orleans in 1902. Scale [ca. 1:50,900]. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Louisiana State Plane Coordinate System, South NAD83 (in Feet) (Fipszone 1702). 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 water distribution features such as existing and proposed water mains (with sizes), suction pipes, and water purification station sites. Also shows other features such as roads, canals, levees, drainage, cemeteries, Parish boundaries, and more. Shaded to show built-up and unbuilt areas for construction. 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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  2. Title: New Orleans, Louisiana and vicinity, 1931 (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced raster image of the historic paper map entitled: Map of greater New Orleans, Louisiana. It was published by the New Orleans Association of Commerce in 1931. Scale [ca. 1:32,000]. Covers also adjacent portions of Jefferson and St. Bernard Parishes. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Louisiana State Plane Coordinate System, South NAD83 (in Feet) (Fipszone 1702). 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 roads, railroads, canals, levees, drainage, land ownership in outlying areas, cemeteries, parks, Parish boundaries, ferry routes, and more. Includes index in margins. 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: Plan of Sewerage System, Walpole, Massachusetts, 1983 (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced raster image of the historic paper map entitled: Plan of sewerage system, SEA Consultants, Inc. [for] Town of Walpole Board of Sewer and Water Commissioners. It was published by SEA Consultants, Inc. in 1983. Scale [ca. 1:23,000]. 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, index maps, legends, or other information associated with the principal map. This map shows features such as roads, railroads, watersheds, drainage, schools, cities and other human settlements, territorial boundaries, shoreline features, and more. Includes also legend of sewerage plans. 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.

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  4. Title: New York City Voting Poll Sites, 2013

    Contributors:

    Summary: New York City Voting Poll Sites, 2013 is a point theme representing polling locations in New York City as of 2013.

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  5. Title: New York City Voting Poll Sites, 2012

    Contributors:

    Summary: New York City Voting Poll Sites, 2012 is a point theme representing polling locations in New York City as of 2012.

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  6. Title: Inland Waterways of New Jersey 1928

    Contributors:

    Summary: Three part map of New Jersey inland waterways from Cape May to the Manasquan River. Scales shown in nautical miles and yards.

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  7. Title: New Orleans, Louisiana, 1884 (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced raster image of the historic paper map entitled: Map of the city of New Orleans showing location of exposition grounds and all approaches thereto by land & water, [by] the World's Industrial and Cotton Centennial Exposition, New Orleans, La., U.S.A., Department of Installation. It was published by The Exposition ca. 1884. Scale [ca. 1:2,000]. Covers also adjacent portions of Jefferson and St. Bernard Parishes. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Louisiana State Plane Coordinate System, South NAD83 (in Feet) (Fipszone 1702). 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 exposition grounds, railroads, roads, canals, levees, drainage, block numbers, land ownership in outlying areas, selected public and industrial buildings, cemeteries, Parish boundaries, ferry routes, and more. Depths shown by soundings. Includes inset views, plans, and engravings: Perspective view of the buildings and grounds from the Northeast -- Mexican national headquarters -- Grand Rapids (Mich.) furniture pavilion -- [South pass] -- View of New Orleans in 1719 -- Railroad map of Louisiana and Texas -- Plan of New Orleans in 1770 by Capt.n Pittman of the British Army -- Ground plan -- United States and state exhibits -- Art gallery -- Main building -- Factories and Mills -- Horticultural hall. 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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  8. Title: Boston and vicinity, Massachusetts -- Water works, 1852 (Raster Image)

    Contributors:

    Summary: This layer is a georeferenced raster image of the historic paper map entitled: Map of the Boston water works, prepared under the direction of the Cochituate Water Board ; E.S. Chesbrough, city engineer ; drawn by Charles Perkins. It was published in 1852. Scale [1:38,400]. It covers the area Lake Cochituate (Natick, Framingham, Wayland) to Boston Harbor, and Everett to Dorchester, Massachusetts. 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 water supply lines and features such as culverts, gatehouses, drains, waste weirs, tunnels, aqueducts, and reservoirs. Shows also features including roads, railroads, drainage, town boundaries, and more. Includes 2 profiles: Profile [of main branch] -- Profile of South Boston branch. Vertical scale [1:1,200]. 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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  9. Title: West central Iowa river basins showing location of basins with respect to state principal drainage lines within area

    Contributors:

    Summary: 1 map black line ; 83 x 114 cm Iowa state plan. "W.P.A. project 962."

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  10. Title: Northwestern Iowa river basins showing locations of basins with respect to state principal drainage lines within basins

    Contributors:

    Summary: 1 map black line ; 83 x 114 cm Iowa state plan. "W.P.A. project 962."

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  11. Title: Northeastern Iowa river basins showing locations of basins with respect to state & principal drainage lines within basins

    Contributors:

    Summary: 1 map ; black line; 83 x 114 cm Iowa state plan.; "W.P.A. project 962."

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  12. Title: Northeastern Iowa river basins including the Maquoketa, Turkey, & Upper Iowa Rivers

    Contributors:

    Summary: 1 map ; black line, plastic; 56 x 48 cm WPA project no. 962.

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  13. Title: Iowa-Cedar River basins showing location of basins with respect to state principal drainage lines within basins

    Contributors:

    Summary: 1 map black line ; 83 x 114 cm W.P.A. project no. 962. "Iowa state plan."

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  14. Title: South central Iowa river basins showing locations of basins with respect to state principal drainage lines within basins

    Contributors:

    Summary: 1 map black line ; 83 x 114 cm Iowa state plan. "W.P.A. project 962."

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  15. Title: Des Moines-Skunk River basins showing location of basins with respect to state principal drainage lines within area

    Contributors:

    Summary: 1 map black line, hand colored ; 83 x 114 cm W.P.A. project no. 962. "Iowa state plan."

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  16. Title: Septic Systems, New York State, 2011

    Contributors:

    Summary: This dataset presents counts of septic systems at the census tract level. Data were derived from 2011 county parcel data and aggregated by census tract. Septic systems are used by 22% of homes in New York State, and they are important components of the wastewater infrastructure. This dataset quantifies how many septic systems are used across New York State.

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  17. 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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  18. 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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  19. Title: LiDAR-Derived Culverts (Points) for Milwaukee County and the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents LiDAR-derived culverts (points) 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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  20. Title: LiDAR-Derived Buildings (3-D) for the Milwaukee Metropolitan Sewerage District (MMSD), WI 2021

    Contributors:

    Summary: This data represents buildings (3-D) for the Milwaukee Metropolitan Sewerage District (MMSD) in 2021. [3-D Building Models representing every building in Milwaukee County, WI present in the 2020 lidar survey. Models are based a standardized feature extraction algorithm using esri software. There are roughly 3 levels of detail present in the dataset: Level of Detail (LOD) 1 (simple/prismatic buildings with flat roof detail), LOD 2 (includes roof structure details such as hip and gable roofforms), LOD 3 with several iconic buildings modeled to to mimic their real-world aesthetic (examples are: US Bank Building, Miller Park, and Milwaukee City Hall). Highlights of the model include the differentiation of building components including roof, facades, and ground plane. Data is made available as a single Multipatch feature class consisting of over 400,000 individual building models.]

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