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Scheduled monument

Hertfordshire Grim's Ditch: 990m long section between Crawley's Lane and Rossway Lane

Geographical area

About this entity

Fact links
CURIE scheduled-monument:1021205 no fact link
Prefix scheduled-monument Facts
Reference 1021205 Facts
Name Hertfordshire Grim's Ditch: 990m long section between Crawley's Lane and Rossway Lane Facts
Quality Authoritative: We have some data from the authoritative source no fact link
Dataset Scheduled monument no fact link
Organisation Historic England no fact link
Start date 1929-02-20 Facts
End date Facts
Entry date 2004-02-24 Facts
Typology geography no fact link
Geometry MULTIPOLYGON (((-0.616009 51.771568, -0.615966 51.771737, -0.61764 51.772203, -0.618252 51.772377, -0.618475 51.772438, -0.618656 51.772499, -0.618765 51.772543, -0.618939 51.772566, -0.619205 51.772592, -0.61943 51.772641, -0.619789 51.772729, -0.620575 51.772932, -0.621648 51.773198, -0.622668 51.773443, -0.622916 51.773509, -0.623111 51.77355, -0.623317 51.773585, -0.623469 51.773626, -0.623659 51.773681, -0.62383 51.773734, -0.624035 51.77379, -0.624297 51.773852, -0.624503 51.773904, -0.624772 51.773986, -0.625044 51.774052, -0.625275 51.774111, -0.625869 51.774348, -0.627734 51.775225, -0.628386 51.775525, -0.628486 51.775486, -0.628664 51.775455, -0.628752 51.775456, -0.628802 51.775429, -0.627843 51.774924, -0.627579 51.77479, -0.627356 51.774701, -0.626138 51.774222, -0.625858 51.774118, -0.625616 51.774026, -0.625188 51.773893, -0.624926 51.773821, -0.622584 51.773228, -0.62195 51.773084, -0.621079 51.772856, -0.619313 51.772398, -0.619104 51.772342, -0.618971 51.772293, -0.618824 51.772226, -0.618671 51.772147, -0.618285 51.772033, -0.617749 51.771871, -0.617476 51.771804, -0.616842 51.771634, -0.616351 51.771533, -0.616036 51.77147, -0.616009 51.771568))) Facts
Point POINT (-0.622142 51.773293) Facts
Documentation url https://historicengland.org.uk/listing/the-list/list-entry/1021205 Facts

Available Code Snippets:

{
        "entry-date": "2004-02-24",
        "start-date": "1929-02-20",
        "end-date": "",
        "entity": 13919364,
        "name": "Hertfordshire Grim's Ditch: 990m long section between Crawley's Lane and Rossway Lane",
        "dataset": "scheduled-monument",
        "typology": "geography",
        "reference": "1021205",
        "prefix": "scheduled-monument",
        "organisation-entity": "16",
        "geometry": "MULTIPOLYGON (((-0.616009 51.771568, -0.615966 51.771737, -0.61764 51.772203, -0.618252 51.772377, -0.618475 51.772438, -0.618656 51.772499, -0.618765 51.772543, -0.618939 51.772566, -0.619205 51.772592, -0.61943 51.772641, -0.619789 51.772729, -0.620575 51.772932, -0.621648 51.773198, -0.622668 51.773443, -0.622916 51.773509, -0.623111 51.77355, -0.623317 51.773585, -0.623469 51.773626, -0.623659 51.773681, -0.62383 51.773734, -0.624035 51.77379, -0.624297 51.773852, -0.624503 51.773904, -0.624772 51.773986, -0.625044 51.774052, -0.625275 51.774111, -0.625869 51.774348, -0.627734 51.775225, -0.628386 51.775525, -0.628486 51.775486, -0.628664 51.775455, -0.628752 51.775456, -0.628802 51.775429, -0.627843 51.774924, -0.627579 51.77479, -0.627356 51.774701, -0.626138 51.774222, -0.625858 51.774118, -0.625616 51.774026, -0.625188 51.773893, -0.624926 51.773821, -0.622584 51.773228, -0.62195 51.773084, -0.621079 51.772856, -0.619313 51.772398, -0.619104 51.772342, -0.618971 51.772293, -0.618824 51.772226, -0.618671 51.772147, -0.618285 51.772033, -0.617749 51.771871, -0.617476 51.771804, -0.616842 51.771634, -0.616351 51.771533, -0.616036 51.77147, -0.616009 51.771568)))",
        "point": "POINT (-0.622142 51.773293)",
        "quality": "authoritative",
        "documentation-url": "https://historicengland.org.uk/listing/the-list/list-entry/1021205",
        "organisation-curie": "government-organisation:PB1164"
    }
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© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on [date]. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

Licensed under the Open Government Licence v.3.0.


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