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AMS China Li-Chiang Region
- Identification Information
- Data Quality Information
- Spatial Data Organization Information
- Spatial Reference Information
- Entity and Attribute Information
- Distribution Information
- Metadata Reference Information
- Identification Information
- Citation
- Originator
- Harvard Map Collection, Harvard College Library
- Publication Date
- 200501
- Title
- AMS China Li-Chiang Region
- Geospatial Data Presentation Form
- remote-sensing image
- Online Linkage
- https://hgl.harvard.edu/catalog/harvard-ams7810-s250-u54-ng47-7
- Abstract
- This layer is a geo-referenced raster image of the Army Map Service 1:250,000 scale China series topographic map of the Li-Chiang region. Compiled in 1954 from L*; China Proper, S.W., 1:250,000, Army Map Service, Sheets G47-J, G47-K, 1946 it was first printed in this series in June 1957. Map Quad ID number is NG47-7. Please note that this map title is an outdated (Wade-Giles romanization) spelling of the Chinese place or feature name for which the map is named. Both this outdated version and the current Pinyin romanization version appear as Place Keywords in this metadata record. A digital raster graphic (DRG) is a scanned image of a standard series topographic map, including all map collar information. The image inside the map neatline is geo-referenced to the surface of the earth and fit to the Universal Transverse Mercator projection. The horizontal positional accuracy and datum of the DRG matches closely with the accuracy and datum of the source map. This map series of China (Series L500) was created and printed by the US Army Corps of Engineers Army Map Service (AMS) during the 1950s. The AMS was later known as the Defense Mapping Agency, which is now subsumed under NIMA. These maps are a contoured topographic map series based largely on the Survey of India. These color maps have contour intervals of 100 meters. Map sources used to create these maps include British Survey of India maps, Japanese civil survey and military maps; United States Air Force (USAF) and United States Hydrographic Office (USHO) charts and a variety of other source maps simply described as the "... best available large scale and medium scale maps of China." These maps are in English, with modified Wade-Giles romanized Chinese place and feature names, many names also appear as Chinese ideographs. These are typical topographic maps with all of the normal topographic information: contours, transportation, culture, etc. Please pay close attention to map collar information on projections, spheroid and keys to grid numbering and other numbers which appear inside the neatline.
- Purpose
- One of the most widely used of all maps is the topographic map. The feature that most distinguishes topographic maps from maps of other types is the use of contour lines to portray the shape and elevation of the land. Topographic maps render the three-dimensional ups and downs of the terrain on a two-dimensional surface. Topographic maps usually portray both natural and manmade features. They show and name works of nature including mountains, valleys, plains, lakes, rivers, and vegetation. They also identify the principal works of humans, such as roads, boundaries, transmission lines, and major buildings. The wide range of information provided by topographic maps make them extremely useful to professional and recreational map users alike. Topographic maps are used for engineering, energy exploration, natural resource conservation, environmental management, public works design, commercial and residential planning, urban planning and design, and outdoor activities like hiking, camping, and fishing. These maps can provide an excellent view of the changes that have occurred in the cultural and physical landscape. As this map has been geo-referenced, it may serve as a useful basemap in conjunction with other GIS data.
- Temporal Extent
- Currentness Reference
- publication date
- Time Instant
- 200502
- Bounding Box
- West
- 98.884837
- East
- 100.798283
- North
- 27.100897
- South
- 25.781430
- ISO Topic Category
- imageryBaseMapsEarthCover
- Theme Keyword
- Maps, Topographic
- Land Use
- Infrastructure
- Human settlements
- Bodies of water
- Landforms
- Theme Keyword Thesaurus
- LCSH
- Place Keyword
- China
- Li-Chiang
- Lijiang
- Dayan
- Yunnan Province
- Place Keyword Thesaurus
- GNS (NIMA)
- Temporal Keyword
- Access Restrictions
- None
- Use Restrictions
- For educational, non-commercial use only. Although this data set has been developed by Harvard University, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials.
- Status
- Complete
- Maintenance and Update Frequency
- None planned
- Point of Contact
- Contact Organization
- Harvard Map Collection, Harvard College Library
- Delivery Point
- Harvard Map Collection
- Delivery Point
- Pusey Library
- Delivery Point
- Harvard University
- City
- Cambridge
- State
- MA
- Postal Code
- 02138
- Country
- USA
- Contact Telephone
- 617-495-2417
- Contact Facsimile Telephone
- 617-496-0440
- Contact Electronic Mail Address
- hgl_ref@hulmail.harvard.edu
- Hours of Service
- Monday through Friday 9:00 A.M. to 4:00 P.M. EST-USA
- Credit
- Harvard Map Collection, Harvard College Library
- Native Data Set Environment
- Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.0.0.535
- Data Quality Information
- Attribute Accuracy Report
- In regards to the original paper maps: Road classification should be referred to with caution. Vegetation information is generally unreliable on many of these maps and the delineation of international boundaries is not considered authoritative. The DRG is a 24-bit per pixel color image that employs a color palette to ensure uniform colors throughout a particular DRG series. All DRGs within a series must have the same RGB value.
- Completeness Report
- The DRG is a faithfully reproduced digital image of the original source map. Some differences may be detected between the source graphic used and the DRG due to the RGB values assigned that particular color. The intent is to recreate those colors as near as possible. Data completeness for DRG files reflect content of the source graphic. All of the AMS Series L500 maps have edition dates and one or more printing dates. Each map also cites its source material which may or may not be dated on the piece. Use these dates to determine the vintage of the cartography.
- Horizontal Positional Accuracy Report
- The positional accuracy of the orginal map was largely preserved during the digitizing and geo-referencing processes. Accuracy may be generally characterized as possessing the highest standards of accuracy given the general survey, instrumentation, design and printing technologies and cartographic techniques available during the time the original map was produced. The original map was scanned and geo-referenced (SEE: Process Steps) to produce this digital version. While the data of the published map is retained in the georeferenced image, the image is referenced to the Universal Transverse Mercator coordinate system, which is inconsistent with the original projection of the paper map, and may lead to discrepancies in the horizontal accuracy of the DRG. The standard used for georeferencing the image to the UTM coordinates was an RMS error below 50 meters. See the process steps for the actual RMS error achieved.
- Lineage
- Source
- Originator
- Army Map Service
- Publication Date
- 1950s
- Title
- AMS Topographic Map
- Geospatial Data Presentation Form
- map
- Source Scale Denominator
- 250,000
- Type of Source Media
- paper
- Source Temporal Extent
- Time Period Information
- Single Date/Time
- Calendar Date
- 195706
- Source Currentness Reference
- publication date
- Contribution
- Original Map was scanned and digitized in preparation for geo-referencing.
- Source
- Originator
- Harvard Map Collection
- Publication Date
- 200412
- Title
- AMS Topographic Map (Digitized Version)
- Geospatial Data Presentation Form
- raster digital data
- Source Scale Denominator
- 250,000
- Type of Source Media
- computer program
- Source Temporal Extent
- Time Period Information
- Single Date/Time
- Calendar Date
- 200502
- Source Currentness Reference
- publication date
- Contribution
- The digitized version of the AMS Topo Map was georeferenced and a world file (.tfw) was created.
- Spatial Data Organization Information
- Direct Spatial Reference Method
- Raster
- Raster Object Information
- Raster Object Type
- Pixel
- Row Count
- 6758
- Column Count
- 8848
- Vertical Count
- 1
- Spatial Reference Information
- Horizontal Coordinate System Definition
- Planar
- Grid Coordinate System
- Grid Coordinate System Name
- Universal Transverse Mercator
- Universal Transverse Mercator
- UTM Zone Number
- 47
- Transverse Mercator
- Scale Factor at Central Meridian
- 0.999600
- Longitude of Central Meridian
- 99.000000
- Latitude of Projection Origin
- 0.000000
- False Easting
- 500000.000000
- False Northing
- 0.000000
- Planar Coordinate Information
- Planar Coordinate Encoding Method
- row and column
- Coordinate Representation
- Abscissa Resolution
- 21.440854
- Ordinate Resolution
- 21.445412
- Planar Distance Units
- meters
- Geodetic Model
- Horizontal Datum Name
- D_WGS_1984
- Ellipsoid Name
- WGS_1984
- Semi-major Axis
- 6378137.000000
- Denominator of Flattening Ratio
- 298.257224
- Entity and Attribute Information
- Entity and Attribute Overview
- This raster image of a topographic maps shows relief, drainage, vegetation, populated places, cultural features, and coastal hydrography. Maps in this series also show transportation features (roads, railroads, tracks and trails), spot elevations and national and international boundaries. Map collar information contains an abundance of ancillary data including map legends, grid numbering systems, glossaries of features and places (in English and modified Wade-Giles Romanized Chinese). Many features are identified by Chinese ideographs as well.
- Distribution Information
- Format Name
- TIFF
- Name
- Metadata Reference Information
- Metadata Date
- 20050502
- Metadata Contact
- Contact Information
- Contact Organization Primary
- Contact Organization
- Harvard Geospatial Library
- Contact Person
- Geospatial Resources Cataloger
- Contact Address
- Address
- Harvard University Library
- Address
- Office For Information Systems
- Address
- 1280 Massachusetts Avenue
- City
- Cambridge
- State or Province
- MA
- Postal Code
- 02138
- Country
- USA
- Contact Voice Telephone
- 617-495-2417
- Contact Facsimile Telephone
- 617-496-0440
- Contact Electronic Mail Address
- hgl_ref@hulmail.harvard.edu
- Hours of Service
- Monday - Friday, 9:00 am - 4:00 pm EST-USA
- Metadata Standard Name
- FGDC Content Standards for Digital Geospatial Metadata
- Metadata Standard Version
- FGDC-STD-001-1998
- Metadata Extensions
- Online Linkage
- http://www.esri.com/metadata/esriprof80.html
- Profile Name
- ESRI Metadata Profile
