Browse data ecan_liquefaction_polygon

Canterbury liquefaction polygons

Regional liquefaction susceptibility polygons compiled from post-2010/2011 earthquake studies.

Licence: CC-BY 4.0 Source: Environment Canterbury (www.ecan.govt.nz), CC-BY 4.0.

Data as of 2026-07-01  · monthly  · 1,484 rows

Map preview
Showing 200 sample features
CRS
EPSG:4326

Centroids only — full geometry available via the API or CSV download.

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Dataset ID
ecan_liquefaction_polygon
Data source
ECan / Canterbury
Last refreshed
2026-07-01
Refresh cadence
monthly
API endpoint
https://api.eolas.fyi/v1/datasets/ecan_liquefaction_polygon/data

Columns (73)

schema glossary · auto-generated
Column Type Description
date string Observation date
object_id long Internal feature ID (ArcGIS OBJECTID)
fid_l3_eastern_canterbury_liquef double Feature ID l3 eastern canterbury liquef
perimeter_m double Perimeter m
area_ha double Area ha
liquefaction string Liquefaction
superseded string Superseded
fid_l7_selwyn_liquefaction_susce double Feature ID l7 selwyn liquefaction susce
id string ID
descrip string Descrip
perimeter_m_1 double Perimeter m 1
area_ha_1 double Area ha 1
liquefaction_susceptibility string Liquefaction susceptibility
superseded_1 string Superseded 1
fid_l31_ashburton_liquefaction_v double Feature ID l31 ashburton liquefaction v
liq_cat string Liq cat
descrip_1 string Descrip 1
detail string Detail
author string Author
report string Report
purpose string Purpose
notes string Notes
district string District
fid_l9_timaru_liquefaction_vulne double Feature ID l9 timaru liquefaction vulne
descriptio string Descriptio
f2020_vul_c string F2020 vul c
subdiv string Subdiv
imp_infra string Imp infra
build_cons string Build cons
fid_l29_mackenzie_liquefaction_v double Feature ID l29 mackenzie liquefaction v
liq_cat_1 string Liq cat 1
detail_1 string Detail 1
date_1 string Date 1
author_1 string Author 1
purpose_1 string Purpose 1
descrip_12 string Descrip 12
report_1 string Report 1
notes_1 string Notes 1
district_1 string District 1
fid_l28_waimate_liquefaction_vul double Feature ID l28 waimate liquefaction vul
object_id_1 double Object ID 1
liq_cat_12 string Liq cat 12
descrip_12_13 string Descrip 12 13
detail_12 string Detail 12
date_12 string Date 12
author_12 string Author 12
report_12 string Report 12
purpose_12 string Purpose 12
notes_12 string Notes 12
fid_l30_waitaki_liquefaction_vul double Feature ID l30 waitaki liquefaction vul
liq_cat_12_13 string Liq cat 12 13
detail_12_13 string Detail 12 13
date_12_13 string Date 12 13
author_12_13 string Author 12 13
purpose_12_13 string Purpose 12 13
descrip_12_13_14 string Descrip 12 13 14
report_12_13 string Report 12 13
notes_12_13 string Notes 12 13
district_12 string District 12
fid_l14_liquefaction_vulnerabilit double Feature ID l14 liquefaction vulnerabilit
study_date string Study date
author_12_13_14 string Author 12 13 14
rept_ref string Rept ref
purpose_12_13_14 string Purpose 12 13 14
purp_oth string Purp oth
base_inf string Base inf
uncert string Uncert
notes_12_13_14 string Notes 12 13 14
detail_12_13_14 string Detail 12 13 14
liq_cat_12_13_14 string Liq cat 12 13 14
shape_area double Polygon area (source projection units)
shape_length double Geometry length/perimeter (source projection units)
geometry_wkt string Geometry as WKT (WGS84) — MULTIPOLYGON/POINT/LINESTRING

How to query this dataset

Fetch all data (JSON)
curl https://api.eolas.fyi/v1/datasets/ecan_liquefaction_polygon/data \
  -H "X-API-Key: your_key_here"
Filter by date range
curl "https://api.eolas.fyi/v1/datasets/ecan_liquefaction_polygon/data?start=2020-01-01&end=2024-12-31" \
  -H "X-API-Key: your_key_here"
Download as CSV
curl "https://api.eolas.fyi/v1/datasets/ecan_liquefaction_polygon/data?format=csv" \
  -H "X-API-Key: your_key_here" -o ecan_liquefaction_polygon.csv

Data preview

Hidden in preview: geometry_wkt — fetch via the API or download CSV to get the full data.
DateObject IdFid L3 Eastern Canterbury LiquefPerimeter MArea HaLiquefactionSupersededFid L7 Selwyn Liquefaction SusceIdDescripPerimeter M 1Area Ha 1Liquefaction SusceptibilitySuperseded 1Fid L31 Ashburton Liquefaction VLiq CatDescrip 1DetailAuthorReportPurposeNotesDistrictFid L9 Timaru Liquefaction VulneDescriptioF2020 Vul CSubdivImp InfraBuild ConsFid L29 Mackenzie Liquefaction VLiq Cat 1Detail 1Date 1Author 1Purpose 1Descrip 12Report 1Notes 1District 1Fid L28 Waimate Liquefaction VulObject Id 1Liq Cat 12Descrip 12 13Detail 12Date 12Author 12Report 12Purpose 12Notes 12Fid L30 Waitaki Liquefaction VulLiq Cat 12 13Detail 12 13Date 12 13Author 12 13Purpose 12 13Descrip 12 13 14Report 12 13Notes 12 13District 12Fid L14 Liquefaction VulnerabilitStudy DateAuthor 12 13 14Rept RefPurpose 12 13 14Purp OthBase InfUncertNotes 12 13 14Detail 12 13 14Liq Cat 12 13 14Shape AreaShape Length
1-1.00.00.0Liquefaction is possible-1.00.00.0-1.0-1.0-1.0-1.00.0-1.0-1.09881852.12939453135630.505094879016
2-1.00.00.0Liquefaction is possible-1.00.00.0-1.0-1.0-1.0-1.00.0-1.0-1.01498904.01708984387466.96238899404
3-1.00.00.0Liquefaction is possible-1.00.00.0-1.0-1.0-1.0-1.00.0-1.0-1.04564943.344726562516639.416443897495
4-1.00.00.0Liquefaction is possible-1.00.00.0-1.0-1.0-1.0-1.00.0-1.0-1.014519665.16748046968316.59680387743
5-1.00.00.0Liquefaction is possible-1.00.00.0-1.0-1.0-1.0-1.00.0-1.0-1.01077614.67431640625273.211215081984

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