945 results returned
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Title: Reconstruction of North American Drainage Basins and River Discharge Since the Last Glacial Maximum)
Contributors:- Polygon data ; Vector data
- 2016
Summary: Drainage basins and river discharges since the Last Glacial Maximum; released along with the article "Reconstruction of North American drainage basins and river discharge since the Last Glacial Maximum" to appear in the journal "Earth Surface Dynamics". Changes in major drainage basins and river discharges across North American since the Last Glacial Maximum from calculations based on five different reconstructions of past ice sheets and glacial-isostatic adjustment. River discharges are stored as Numpy binary files. Drainage basins are stored as shapefiles. Images and videos are available for each ice-sheet and glaical-isostatic adjustment model tested. These images show past topography and sea level, drainage basin extents as black lines, rivers with local flow greater than 1000 cubic meters per second as blue lines, and the footprint of the ice-sheet as a semitransparent light-colored region. Ages are in the folder and file names for the drainage basins and the images, and take the form, "0XXXXX', where this is the number of years before present (i.e. before 1950) that the rivers of North America are simulated to be structured as shown.
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Title: Lisbon, Portugal, 1785 (Raster Image)
Contributors:- Raster data
- 2008
Summary: This layer is a georeferenced raster image of the historic paper map entitled: Plano geral da cidade de Lisboa em 1785, Franco. D. Milcent. It was published in [1785]. Scale [ca. 1:10,950]. Covers a portion of Lisbon, Portugal. The image inside the map neatline is georeferenced to the surface of the earth and fit to the European Datum 1950, UTM Zone 29N 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. Relief is shown by hachures. Includes index. 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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Title: East and Central China, 1841 (Raster Image)
Contributors:- Raster data
- 2011
- Harvard Map Collection, Harvard College Library
- Roost, J. B.
- J.G. Cotta'sche Buchhandlung.
- Grasmuller, D.
Summary: This layer is a georeferenced raster image of the historic paper map entitled: Karte von China mit dessen Eintheilung in 18 Provinzen, nach den neuesten u. zuverlassigsten Materialien entworfen, gezeichnet und bearbeitet von J. B. Roost ; in Stein grawirt v. D. Grasmuller. It was published der liter. artist. Anstalt der L.G. Cotta'schen Buchhandlung in 1841. Scale 1:6,500,000. Covers East and Central China, and the Korean Peninsula. Map in German. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Asia North 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, roads, territorial and provincial boundaries, 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.
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Title: Geologic map and cross section of Ohio
Contributors:- Thematic maps
- 1965
Summary: Includes color cross section. D. Pfannehecker. Scale 1:2,250,000.
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Title: Gornopromyshlennaia karta Evropeĭskoĭ Rossīi : s ́pokazaniem' gornykh' zavodovʹ i miestorozhdenīĭ poleznykh' iskopaemykh' : izdanie redakshin "Gornoe di'lo v' Rossii."
Contributors:- Not specified
- 1903
Summary: Includes 3 ancillary maps.; Indexed.; Separated into sections and mounted on linen.; "Kartografi. zav. D. Rudneva Nov. per. d. 5 kb. 46." 146 x 132 centimeters
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Title: Post route map of the states of Michigan and Wisconsin: with adjacent parts of Ohio, Indiana, Illinois, Iowa, and Minnesota; designed and constructed under the orders of John A.J. Creswell and Giles A. Smith by W.L. Nicholson.
Contributors:- Not specified
- 1871
Summary: Prime meridian: Washington. Shows railroad lines. "Drawn by C.H. Poole. Engraved by D. McClelland." "The service on this diagram brought up to date of [April 1st, 1874]." Includes "General statistics," "Explanation of mail service," and table of distances. 1 map: hand color; 105 x 141 cm
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Title: Map of the city of Washington : established as the permanent seat of the government of the United States of America
Contributors:- Not specified
- 1850
Summary: Shows block numbers, wards, and major buildings. Includes index to points of interest and inset "Map of the District of Columbia." 34 x 44 centimeters
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Title: A plat exhibiting the state of the surveys in the State of Florida, with references; D. McClelland, sc., Washington.
Contributors:- Not specified
- 1848
Summary: 1 map; 57 x 64 cm
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Title: The state of Florida compiled in the Bureau of Topographical Engineers, from the best authorities; by J. Goldsborough Bruff; D. McClelland, sc., 1846.
Contributors:- Not specified
- 1846
- Bruff, Joseph Goldsborough, 1804-1889
- McClelland, D.
- United States. Army. Corps of Topographical Engineers
Summary: Relief shown by hachures. Insets: Key West -- Mouths of the Suwanee River and the Cedar Keys -- General map of part of Florida included between Cedar Keys and St. John's River. Map indicates townships. 1 map; 105 x 101 cm
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Title: Block-level, non-work accessibility data for planned transitways in the Twin Cities [Minnesota]
Contributors:- Vector data ; Point data ; Polygon data
- 2021
Summary: Accessibility to grocery stores, primary healthcare, elementary, middle, and high schools by transit is measured for the Twin Cities. Census block-level minimum travel times to the first, second, third,...,tenth destination are calculated before and after incorporating services changes to the transit network. The transit network baseline includes the Green Line extension and Orange Line. Five planned transitways are evaluated against the baseline including the B Line and local route 21 changes, the D Line and local route 5 changes, the E Line and local route 6 changes, the Gold Line, and the Rush Line. The analysis is completed for four departure windows during the weekday. The report associated with this data aggregates across the Twin Cities metropolitan worker population and disaggregates by worker demographics. The data are organized by scenario then by departure window for a total of 28 scenarios. Each scenario has a Geopackage spatial file which is comprised of result layers for the five destination types studied. Travel times between blocks and X number of destinations are given in seconds. For example, this data answers the question "What is the minimum travel time on transit needed to reach 3 different grocery stores?"
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Title: Block-level accessibility data for managed lanes in the Twin Cities] (2019)
Contributors:- Line data ; Vector data
- 2020
Summary: The data are provided in 4 ESRI shapefiles. The shapefiles are segmented by the analysis day of the week and departure time. The fields include the Census block-level 15-digit identifier (GEOID10), baseline accessibility, tier 1 managed lane scenario accessibility, their absolute difference, their percent difference. CRS EPSG: 4326 - WGS 84. Users should be able to map the cumulative job accessibility by automobile for 4 comparisons between baseline (general purpose lanes) and managed lanes (tier 1 corridors).
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Title: Block-level accessibility data for transit-way evaluation in the Twin Cities metropolitan region] (2019)
Contributors:- Line data ; Vector data
- 2020
Summary: The data are provided in 20 shapefiles. The shapefiles are segmented by the scenario comparison and the analysis day/time. The fields include the Census block-level 15-digit identifiers, baseline accessibility, alternative scenario accessibility, their absolute difference, their percent difference. CRS EPSG: 4326 - WGS 84. Users should be able to map the cumulative job accessibility by transit for 5 transit network scenarios and 4 comparisons between transit networks.
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Title: Access Across America Bike Data [Nashville-Davidson--Murfreesboro--Franklin, TN] (2017)
Contributors:- Vector data
- 2020
Summary: This data was created as part of a study that examined the accessibility to jobs by biking in the 50 largest (by population) metropolitan areas in the United States, on low-stress and higher-stress streets via a Level of Traffic Stress analysis process. It is the most detailed evaluation to date of access to jobs by bike nationally, and it allows for a direct comparison of the bicycle accessibility performance of America's largest metropolitan areas. This data are part of a longitudinal study. Downloads are available for individual metropolitan regions, as well as states, in Geopackage format. Each individual ZIP file for a metropolitan area or state contains four ZIP-compressed Geopackage files of accessibility data, one for each of the four Level of Traffic Stress levels 1-4. A combined ZIP file containing the data for all metropolitan regions is also available in Geopackage format, and is labeled as "All Metropolitan Regions."
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Title: Access Across America Bike Data [Birmingham-Hoover, AL] (2017)
Contributors:- Vector data
- 2020
Summary: This data was created as part of a study that examined the accessibility to jobs by biking in the 50 largest (by population) metropolitan areas in the United States, on low-stress and higher-stress streets via a Level of Traffic Stress analysis process. It is the most detailed evaluation to date of access to jobs by bike nationally, and it allows for a direct comparison of the bicycle accessibility performance of America's largest metropolitan areas. This data are part of a longitudinal study. Downloads are available for individual metropolitan regions, as well as states, in Geopackage format. Each individual ZIP file for a metropolitan area or state contains four ZIP-compressed Geopackage files of accessibility data, one for each of the four Level of Traffic Stress levels 1-4. A combined ZIP file containing the data for all metropolitan regions is also available in Geopackage format, and is labeled as "All Metropolitan Regions."
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Title: Access Across America Bike Data [New Orleans-Metairie-Kenner, LA] (2017)
Contributors:- Vector data
- 2020
Summary: This data was created as part of a study that examined the accessibility to jobs by biking in the 50 largest (by population) metropolitan areas in the United States, on low-stress and higher-stress streets via a Level of Traffic Stress analysis process. It is the most detailed evaluation to date of access to jobs by bike nationally, and it allows for a direct comparison of the bicycle accessibility performance of America's largest metropolitan areas. This data are part of a longitudinal study. Downloads are available for individual metropolitan regions, as well as states, in Geopackage format. Each individual ZIP file for a metropolitan area or state contains four ZIP-compressed Geopackage files of accessibility data, one for each of the four Level of Traffic Stress levels 1-4. A combined ZIP file containing the data for all metropolitan regions is also available in Geopackage format, and is labeled as "All Metropolitan Regions."
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Title: Access Across America Bike Data [Pittsburgh, PA] (2017)
Contributors:- Vector data
- 2020
Summary: This data was created as part of a study that examined the accessibility to jobs by biking in the 50 largest (by population) metropolitan areas in the United States, on low-stress and higher-stress streets via a Level of Traffic Stress analysis process. It is the most detailed evaluation to date of access to jobs by bike nationally, and it allows for a direct comparison of the bicycle accessibility performance of America's largest metropolitan areas. This data are part of a longitudinal study. Downloads are available for individual metropolitan regions, as well as states, in Geopackage format. Each individual ZIP file for a metropolitan area or state contains four ZIP-compressed Geopackage files of accessibility data, one for each of the four Level of Traffic Stress levels 1-4. A combined ZIP file containing the data for all metropolitan regions is also available in Geopackage format, and is labeled as "All Metropolitan Regions."
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Title: Access Across America Bike Data [Buffalo-Niagara Falls, NY] (2017)
Contributors:- Vector data
- 2020
Summary: This data was created as part of a study that examined the accessibility to jobs by biking in the 50 largest (by population) metropolitan areas in the United States, on low-stress and higher-stress streets via a Level of Traffic Stress analysis process. It is the most detailed evaluation to date of access to jobs by bike nationally, and it allows for a direct comparison of the bicycle accessibility performance of America's largest metropolitan areas. This data are part of a longitudinal study. Downloads are available for individual metropolitan regions, as well as states, in Geopackage format. Each individual ZIP file for a metropolitan area or state contains four ZIP-compressed Geopackage files of accessibility data, one for each of the four Level of Traffic Stress levels 1-4. A combined ZIP file containing the data for all metropolitan regions is also available in Geopackage format, and is labeled as "All Metropolitan Regions."
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Title: Access Across America Bike Data [Indianapolis-Carmel, IN] (2017)
Contributors:- Vector data
- 2020
Summary: This data was created as part of a study that examined the accessibility to jobs by biking in the 50 largest (by population) metropolitan areas in the United States, on low-stress and higher-stress streets via a Level of Traffic Stress analysis process. It is the most detailed evaluation to date of access to jobs by bike nationally, and it allows for a direct comparison of the bicycle accessibility performance of America's largest metropolitan areas. This data are part of a longitudinal study. Downloads are available for individual metropolitan regions, as well as states, in Geopackage format. Each individual ZIP file for a metropolitan area or state contains four ZIP-compressed Geopackage files of accessibility data, one for each of the four Level of Traffic Stress levels 1-4. A combined ZIP file containing the data for all metropolitan regions is also available in Geopackage format, and is labeled as "All Metropolitan Regions."
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Title: Access Across America Bike Data [New York-Northern New Jersey-Long Island, NY-NJ-PA] (2017)
Contributors:- Vector data
- 2020
Summary: This data was created as part of a study that examined the accessibility to jobs by biking in the 50 largest (by population) metropolitan areas in the United States, on low-stress and higher-stress streets via a Level of Traffic Stress analysis process. It is the most detailed evaluation to date of access to jobs by bike nationally, and it allows for a direct comparison of the bicycle accessibility performance of America's largest metropolitan areas. This data are part of a longitudinal study. Downloads are available for individual metropolitan regions, as well as states, in Geopackage format. Each individual ZIP file for a metropolitan area or state contains four ZIP-compressed Geopackage files of accessibility data, one for each of the four Level of Traffic Stress levels 1-4. A combined ZIP file containing the data for all metropolitan regions is also available in Geopackage format, and is labeled as "All Metropolitan Regions."
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Title: Access Across America Bike Data [Kansas City, MO-KS] (2017)
Contributors:- Vector data
- 2020
Summary: This data was created as part of a study that examined the accessibility to jobs by biking in the 50 largest (by population) metropolitan areas in the United States, on low-stress and higher-stress streets via a Level of Traffic Stress analysis process. It is the most detailed evaluation to date of access to jobs by bike nationally, and it allows for a direct comparison of the bicycle accessibility performance of America's largest metropolitan areas. This data are part of a longitudinal study. Downloads are available for individual metropolitan regions, as well as states, in Geopackage format. Each individual ZIP file for a metropolitan area or state contains four ZIP-compressed Geopackage files of accessibility data, one for each of the four Level of Traffic Stress levels 1-4. A combined ZIP file containing the data for all metropolitan regions is also available in Geopackage format, and is labeled as "All Metropolitan Regions."