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Chester Castle, Chester, England, ca. 1745 (Raster Image)

Identification Information
Citation
Originator
Harvard Map Collection, Harvard College Library
Originator
De Lavaux, Alexander.
Originator
Parr, Richard.
Publication Date
201410
Title
Chester Castle, Chester, England, ca. 1745 (Raster Image)
Geospatial Data Presentation Form
map
Publication Information
Publication Place
Cambridge, Massachusetts
Publisher
Harvard Map Collection, Harvard College Library
Online Linkage
https://hgl.harvard.edu/catalog/harvard-g5754-c48-1745-d5
Abstract
This layer is a georeferenced raster image of the historic paper map entitled: A plan of the castle of Chester : with additional new works errected by order of ... the Earl of Cholmondeley, whereunto is added a project of four bastions in order to defend the antient walls against a regular seige ... by ... Alexander de Lavaux. R. Parr sculp. It was published by Alexander de Lavaux ca. 1745. Scale [ca. 1:300]. The image inside the map neatline is georeferenced to the surface of the earth and fit to the 'British National Grid' 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 fortification features such as buildings, stables, guard houses, towers, quarters, stairs, gates, parade grounds, arsenals, wells, ground cover, and more. Includes also index.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.
Purpose
Historic paper maps can provide an excellent view of the changes that have occurred in the cultural and physical landscape. The wide range of information provided on these maps make them useful in the study of historic geography, and urban and rural land use change. As this map has been georeferenced, it can be used in a GIS as a source or background layer in conjunction with other GIS data.
Temporal Extent
Currentness Reference
source map approximate publication date
Time Instant
1745
Bounding Box
West
-2.894798
East
-2.890079
North
53.187509
South
53.184334
Theme Keyword
Maps
Human settlements
Cities and towns
Fortification
Landforms
Bodies of water
Land use
Infrastructure (Economics)
Transportation
Theme Keyword Thesaurus
LCSH
ISO Topic Category
imageryBaseMapsEarthCover
intelligenceMilitary
Place Keyword
United Kingdom
Chester
Chester Castle (Chester, England)
Place Keyword Thesaurus
LCSH
Temporal Keyword
Access Restrictions
None
Use Restrictions
For educational, non-commercial use only.
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 - Friday, 9:00 am - 4:00 pm EST-USA
Native Data Set Environment
ESRI ArcGIS 9.3.1
Data Quality Information
Attribute Accuracy Report
The georeferenced raster is a faithfully reproduced digital image of the original source map. Some differences may be detected between the source graphic used and the raster image due to the RGB values assigned that particular color. The intent is to recreate those colors as near as possible.
Completeness Report
Data completeness for raster digital image files reflect content of the source graphic. Features may have been eliminated or generalized on the source graphic due to scale and legibility constraints
Horizontal Positional Accuracy Report
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. For instance, this raster image was georeferenced to another georeferenced image, which has its own positional inaccuracies (see "Process Steps"). 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 0.63393 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.
Lineage
Source
Originator
De Lavaux, Alexander.
Originator
Parr, Richard.
Publication Date
1745
Title
A plan of the castle of Chester : with additional new works errected by order of ... the Earl of Cholmondeley, whereunto is added a project of four bastions in order to defend the antient walls against a regular seige
Geospatial Data Presentation Form
map
Publication Information
Publication Place
Chester
Publisher
Alexander de Lavaux
Other Citation Details
1 map ; 61 x 78 cm.
Source Scale Denominator
300
Type of Source Media
paper
Source Temporal Extent
Time Period Information
Single Date/Time
Calendar Date
1745
Source Currentness Reference
approximate publication date
Contribution
Source map for raster image
Spatial Data Organization Information
Direct Spatial Reference Method
Raster
Raster Object Information
Raster Object Type
Pixel
Row Count
7509
Column Count
9737
Vertical Count
1
Spatial Reference Information
Horizontal Coordinate System Definition
Planar
Map Projection
Map Projection Name
Transverse Mercator
Transverse Mercator
Scale Factor at Central Meridian
0.999601
Longitude of Central Meridian
-2.000000
Latitude of Projection Origin
49.000000
False Easting
400000.000000
False Northing
-100000.000000
Planar Coordinate Information
Planar Coordinate Encoding Method
row and column
Coordinate Representation
Abscissa Resolution
0.031933
Ordinate Resolution
0.046513
Planar Distance Units
meters
Geodetic Model
Horizontal Datum Name
D_OSGB_1936
Ellipsoid Name
Airy_1830
Semi-major Axis
6377563.396000
Denominator of Flattening Ratio
299.324965
Entity and Attribute Information
Entity and Attribute Overview
The indexes reference a color palette of RGB values from 0 through 255, representing the color value from the original paper sheet map. The colors on that sheet can represent relief, drainage, vegetation, populated places, cultural features, coastal hydrography, transportation features (roads, railroads, tracks and trails), spot elevations and boundaries. The colors are sometimes explained in a legend that is incorporated into the map inset or collar.
Entity and Attribute Detail Citation
Not applicable.
Distribution Information
Format Name
GeoTIFF
Distributor
Harvard University Information Technology
Online Access
http://hgl.harvard.edu/
Name
Metadata Reference Information
Metadata Date
20141002
Metadata Contact
Contact Information
Contact Organization Primary
Contact Organization
Harvard Geospatial Library
Contact Position
Geospatial Resources Cataloger
Contact Address
Address
Harvard University Information Technology
Address
Library Technology Services
Address
90 Mount Auburn Street
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
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