Metadata for putting historical maps online / Chris Fleet (National Library of Scotland)

National Library of Scotland
Leabharlann Nàiseanta na h-Alba
METADATA FOR
PUTTING HISTORICAL
MAPS ONLINE
Metadata for putting historical maps online
22 July 2016

STRUCTURE
▪ Map Images website overview
▪ Main software and structural components
▪ Metadata for maps and features
▪ Metadata for georeferened images and web services
▪ Future directions
22 July 2016

Ordnance Survey, Aberdeen, 1867

National Library of Scotland maps website
http://maps.nls.uk

MAP IMAGES WEBSITE OVERVIEW
▪ NLS paper collections ca. 2 million maps
▪ NLS Map Images website 150,000 online maps - ca. 7.5%
▪ 2012-2015 - ca. 40,000 new maps added per annum
Google Analytics - http://maps.nls.uk - June 2016
▪ 97,039 users per month
▪ 165,177 sessions per month
▪ 797,147 page views per month
▪ 348 orders for images/printouts / £5,405 revenue
▪ 15 “commercial” permission requests / ca. £1,500 income
22 July 2016
MAIN SOURCES

EXPANDING USE OF OPEN-SOURCE TECHNOLOGIES
Main open-source software:
● OSGeo suite
● GDAL
● QGIS
● GeoServer
● OpenLayers
● IIPImage Server
Main proprietary software:
● MapTiler
● ArcGIS
● Geographic Imager
● SQLServer
22 July 2016

Find By Place
Viewer
Explore Georeferenced
maps Viewer
OpenLayers
Viewer
WMS / WMTS
Services, API
Derivative
Images
Georeferenced
Images
Descriptive
Metadata
Shapefiles /
bboxes
TIFF master
images
Digital Objects Database
metadata
Users
Maps
STRUCTURAL OVERVIEW : MULTIPLE COMPONENTS
WITH DIFFERENT REPLACEMENT CYCLES
22 July 2016

Find By Place
Viewer
Explore Georeferenced
maps Viewer
OpenLayers
Viewer
WMS / WMTS
Services, API
Derivative
Images
Georeferenced
Images
Descriptive
Metadata
Shapefiles /
bboxes
TIFF master
images
Digital Objects Database
metadata
Users
Maps
22 July 2016

DIGITAL OBJECT DATABASE METADATA
22 July 2016

Unique IDs
Generated through the
DOD and retained for all
derivatives - JPEG, JP2,
and GeoTIFFs

GEOGRAPHIC COORDINATES FOR MAP EXTENTS -
ARCGIS
22 July 2016

OPENLAYERS
22 July 2016

IN GEOSERVER
22 July 2016

CACHING BOUNDING BOXES FOR RAPID ONLINE DISPLAY -
GEOWEBCACHE
22 July 2016

WEB FEATURE SERVICE (WFS)
22 July 2016
An open standard developed by the Open Geospatial Consortium allowing requests for
geographical features across the web using platform-independent calls.
URL format request with response received as Geography Markup Language (GML) or Javascript
Object Notation (JSON) format
For example, a WFS request...
http://geoserver.nls.uk/geodata/wfs?service=WFS&version=1.1.0&request=GetFeature&typename=nls:OS_6inch_UK_27700&outputForma
t=text/javascript&format_options=callback:loadFeatures&srsname=EPSG:3857&cql_filter=INTERSECTS(the_geom,POINT(530232
179709))
...and response
loadFeatures({"type":"FeatureCollection","totalFeatures":2,"features":[{"type":"Feature","id":"OS_6inch_UK_27700.1188","geometry":{"type":
"MultiPolygon","coordinates":[[[[-16258.305954289,6704032.196635765],[-16226.801442981383,6714377.231410879],[-
739.9404392996324,6714315.014511256],[-791.0370382677659,6703970.186406469],[-
16258.305954289,6704032.196635765]]]]},"geometry_name":"the_geom","properties":{"IMAGETHUMB":"http://maps.nls.uk/imgsrv/iipsrv.fc
gi?iiif=/10234/102347415.jp2/full/,150/0/native.jpg","IMAGEURL":"http://maps.nls.uk/view/102347415","SHEET":"Surrey
III","DATES":"Surveyed: 1868 to 1873<br>Published:
1880"}},{"type":"Feature","id":"OS_6inch_UK_27700.1247","geometry":{"type":"MultiPolygon","coordinates":[[[[-
17915.666782360982,6709058.027018599],[-17924.76285975371,6719409.4718413325],[-2428.1729460832776,6719408.392362227],[-
2438.702515531777,6709056.951565147],[-17915.666782360982,6709058.027018599]]]]}, etc.

22 July 2016
GEOREFERENCED SEARCH AND RETRIEVAL USING
GEOGRAPHICAL COORDINATES

IN SCOTLANDSPLACES
22 July 2016

IN OLDMAPSONLINE
22 July 2016

IN SHEETFINDER
22 July 2016

SOURCES OF WEB TRAFFIC AND REFERRALS -
1 JULY 2015 - 30 JUNE 2016
22 July 2016

MOST POPULAR PAGES
1 JULY 2015 - 30 JUNE 2016
22 July 2016
ALL PAGES CONTENT DRILLDOWN

22 July 2016
ASSIGNING PLACE METADATA THROUGH A SPATIAL
JOIN

GOOGLE SPIDERING OF CONTENT
22 July 2016

VALUE OF GEOGRAPHIC COORDINATES FOR INDEXING
22 July 2016
● Allows flexible searching by text (place, postcode, county, etc.) and maps
● Allows multiple indexing by past/present geographies
● No need to be tied to fixed controlled vocabularies for geographic names
● Allows easier extension into other portals and harvesting sites
● Allows easier links from other websites and resources
● Allows creation of indexes of new names for new purposes
● Open, non-proprietory, and with complete institutional control over use

DOD METADATA TAKEN INTO MAPS WEBSITE
SQLSERVER DATABASE
22 July 2016

MAPS WEBSITE PAGE METADATA FROM SQLSERVER
22 July 2016

MAPS WEBSITE E-COMMERCE MODULE
22 July 2016

DERIVATIVE IMAGES - PHOTOSHOP BATCH FOR JPG
AND KAKADU BATCH FOR JP2
22 July 2016

CROPPING BORDER IN PHOTOSHOP
22 July 2016

CROPPING BORDER IN PHOTOSHOP
Digital mapping and Georeferencing
22 June 2016

ADDING CONTROL POINTS IN ARCGIS
22 July 2016

ADDING CONTROL POINTS IN ARCGIS
Digital mapping and Georeferencing
22 June 2016

MAPS ARE
SPATIALGeoreferencing 2
Capturing corner Co-
ordinates

SHAPEFILE
METHOD
Linking corner co-
ordinates of maps
geographic extents in
each polygon - within a
shapefile

Automatic cropping and georeferencing based on shapefile
to create seamless mosaic

CROWDSOURCED GEOREFERENCING - BLAEU ATLAS MAIOR
22 July 2016

GEOTIFF METADATA
22 July 2016
Projections and extents information in GeoTIFF header
Driver: GTiff/GeoTIFF
Files: c:Lomond_S_export.tif
Size is 6643, 7930
Coordinate System is:
PROJCS[" Projection Name = Transverse Mercator Units = meters GeoTIFF Units = meters",
GEOGCS["OSGB 1936",
DATUM["OSGB_1936",
SPHEROID["Airy 1830",6377563.396,299.3249646000044,
AUTHORITY["EPSG","7001"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",49],
PARAMETER["central_meridian",-2],
PARAMETER["scale_factor",0.999601272],
PARAMETER["false_easting",400000],
PARAMETER["false_northing",-100000],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (228721.187000000010000,701502.853000000000000)
Pixel Size = (3.000000000000000,-3.000000000000000)
Metadata:
AREA_OR_POINT=Area
TIFFTAG_SOFTWARE=IMAGINE TIFF Support
Copyright 1991 - 1999 by ERDAS, Inc. All Rights Reserved
@(#)$RCSfile: etif.c $ $Revision: 1.10.1.9.1.9.2.11 $ $Date: 2004/09/15 18:42:01EDT $
TIFFTAG_XRESOLUTION=1
TIFFTAG_YRESOLUTION=1
TIFFTAG_RESOLUTIONUNIT=1 (unitless)
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 228721.187, 701502.853) ( 4d45'34.02"W, 56d10'31.42"N)
Lower Left ( 228721.187, 677712.853) ( 4d44'39.21"W, 55d57'42.74"N)
Upper Right ( 248650.187, 701502.853) ( 4d26'19.41"W, 56d10'55.71"N)
Lower Right ( 248650.187, 677712.853) ( 4d25'30.96"W, 55d58'6.83"N)
Center ( 238685.687, 689607.853) ( 4d35'30.87"W, 56d 4'19.55"N)
Band 1 Block=64x64 Type=Byte, ColorInterp=Red
Band 2 Block=64x64 Type=Byte, ColorInterp=Green
Band 3 Block=64x64 Type=Byte, ColorInterp=Blue

WEB MAP TILE SERVICE (WMTS)
22 July 2016
An open standard protocol developed by the Open Geospatial Consortium for serving pre-rendered
georeferenced map tiles over the Internet
Format:
server-and-url/zoom/x/y.png
eg. http://geo.nls.uk/maps/popular/7/62/88.png

HISTORIC MAPS API
22 July 2016

JOHN GRAY CENTRE, HADDINGTON
22 July 2016

FUTURE DEVELOPMENTS
▪ Expanding digitisation of maps and online availability
▪ Growing functionality and range of uses
▪ More collaborative applications
▪ Greater engagement through crowdsourcing
▪ Automatic georeferencing, OCR and vectorisation
22 July 2016

Chris Fleet
c.fleet@nls.uk
/NationalLibraryofScotland
@natlibscotmaps
THANK YOU
Except for images or where otherwise stated this presentation is © National Library of Scotland and is licensed under the Creative Commons
Attribution 4.0 International Licence. To view a copy of this license, visit: http://creativecommons.org/licenses/by/4.0/

Metadata for putting historical maps online / Chris Fleet (National Library of Scotland)

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