Geospatial polygon layer from Southland Councils. Each feature carries the attributes listed below; geometry is provided as WKT in WGS84.
Data as of 2026-05-12 · static · 72 rows
Centroids only — full geometry available via the API or CSV download.
| Column | Type | Description |
|---|---|---|
| date | string | Observation date |
| object_id | long | Internal feature ID (ArcGIS OBJECTID) |
| geomorphic_terrain | string | Geomorphic terrain |
| lateral_spread | string | Lateral spread |
| liq_cat | string | Liq cat |
| detail | string | Detail |
| author | string | Author |
| rept_ref | string | Rept ref |
| purpose | string | Purpose |
| purp_oth | string | Purp oth |
| base_inf | string | Base inf |
| uncert | string | Uncert |
| notes | string | Notes |
| shape_st_area | double | Polygon area (ArcGIS Shape.STArea, source projection units) |
| shape_st_length | double | Geometry length/perimeter (ArcGIS Shape.STLength) |
| geometry_wkt | string | Geometry as WKT (WGS84) — MULTIPOLYGON/POINT/LINESTRING |
curl https://api.eolas.fyi/v1/datasets/icc_liquefaction_vulnerability/data \ -H "X-API-Key: your_key_here"
curl "https://api.eolas.fyi/v1/datasets/icc_liquefaction_vulnerability/data?start=2020-01-01&end=2024-12-31" \ -H "X-API-Key: your_key_here"
curl "https://api.eolas.fyi/v1/datasets/icc_liquefaction_vulnerability/data?format=csv" \ -H "X-API-Key: your_key_here" -o icc_liquefaction_vulnerability.csv
geometry_wkt
— fetch via the API or download CSV to get the full data.| Date | Object Id | Geomorphic Terrain | Lateral Spread | Liq Cat | Detail | Author | Rept Ref | Purpose | Purp Oth | Base Inf | Uncert | Notes | Shape St Area | Shape St Length |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022-06-07 | 1 | Reclamation fill | Possible | Possible | Liquefaction Vulnerability Assessment- Level A and B (basic and calibrated desktop assessment) | Tonkin & Taylor Ltd, PO Box 13 055, Christchurch 8141 | ‘Liquefaction Vulnerability Assessment’, Report for Invercargill City Council by Tonkin &Taylor Ltd, November 2022, Job No. 1018612 | To provide ICC with a district-wide liquefaction vulnerability assessment to identify areas of land potentially susceptible to liquefaction. The technical report and resulting map outputs will be used to inform building consent applications, along with land use and subdivision consents. | Not applicable | The available base information provides enough information for a Level A (basic desktop assessment) level of detail across the Study Area, and in some areas for a Level B (calibrated desktop assessment). The main factor controlling this level of detail is the spatial extent of the available geotechnical investigations and groundwater information across the Study Area. Further studies could be undertaken at higher levels of detail once additional information becomes available.Typically, reclaimed land is formed by placing uncompacted or poorly compacted soil within existing waterways or the sea. These deposits are considered particularly susceptible to liquefaction as they are often loose and saturated (refer to Section 2.3 of the MBIE/MfE Guidance (2017)). Liquefaction analysis of existing subsurface data indicates these soils are susceptible to liquefaction. Reclamation fills are typically highly variable in nature which means there is a high degree of uncertainty associated with their soil characteristics. The Reclamation Fills mapped in the Study Area are low-lying and are adjacent to the coast. They are therefore likely to have shallow depth to groundwater (< 4 m) with the potential to be influenced by sea-level rise. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high (such as terrace edges). | A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of the ICC Liquefaction Vulnerability report. Based on engineering judgement and in accordance with Section 4.5.2 of the MBIE/MfE Guidelines (2017), “…there is a probability of more than 15 percent that liquefaction-induced ground damage will be minor to moderate (or more) for 500-year shaking.” Therefore, the Reclamation Fills have been classified as “Liquefaction Damage is Possible”. | This assessment has been made at a broad scale across the district and is intended to approximately describe the typical range of liquefaction vulnerability across neighbourhood-sized areas. It is not intended to precisely describe liquefaction vulnerability at individual property scale. This information is general in nature, and more detailed site-specific liquefaction assessment may be required for some purposes (e.g., for design of building foundations). A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of this report. | 104304.78271484375 | 2713.730424451387 |
| 2022-06-07 | 2 | Coastal dunes and shorelines | Possible | Undetermined | Liquefaction Vulnerability Assessment- Level A and B (basic and calibrated desktop assessment) | Tonkin & Taylor Ltd, PO Box 13 055, Christchurch 8141 | ‘Liquefaction Vulnerability Assessment’, Report for Invercargill City Council by Tonkin &Taylor Ltd, November 2022, Job No. 1018612 | To provide ICC with a district-wide liquefaction vulnerability assessment to identify areas of land potentially susceptible to liquefaction. The technical report and resulting map outputs will be used to inform building consent applications, along with land use and subdivision consents. | Not applicable | The available base information provides enough information for a Level A (basic desktop assessment) level of detail across the Study Area, and in some areas for a Level B (calibrated desktop assessment). The main factor controlling this level of detail is the spatial extent of the available geotechnical investigations and groundwater information across the Study Area. Further studies could be undertaken at higher levels of detail once additional information becomes available. The Coastal dunes and shoreline terrain is likely to comprise thick (> 5 m), Holocene-age deposits of sands and silts (which are susceptible to liquefaction) and are unlikely to contain a significant proportion of plastic sediments (which are not susceptible to liquefaction). These sediments are typically deposited in higher energy environments, which means the soils are likely to be denser than those found in lower energy environments. The densest soils are typically found within dune deposits adjacent to the open coast. Liquefaction analysis of existing subsurface data indicates these soils are susceptible to liquefaction to varying degrees. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high (such as terrace edges). | A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of the ICC Liquefaction Vulnerability report. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high. Three small areas of this terrain on the coastal side of the southwestern ranges have been classified as “Liquefaction Category is Undetermined” as the deposits are elevated and groundwater depth is unknown. | This assessment has been made at a broad scale across the district and is intended to approximately describe the typical range of liquefaction vulnerability across neighbourhood-sized areas. It is not intended to precisely describe liquefaction vulnerability at individual property scale. This information is general in nature, and more detailed site-specific liquefaction assessment may be required for some purposes (e.g., for design of building foundations). A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of this report. | 253734.828125 | 2878.637054490378 |
| 2022-06-07 | 3 | Coastal dunes and shorelines | Possible | Undetermined | Liquefaction Vulnerability Assessment- Level A and B (basic and calibrated desktop assessment) | Tonkin & Taylor Ltd, PO Box 13 055, Christchurch 8141 | ‘Liquefaction Vulnerability Assessment’, Report for Invercargill City Council by Tonkin &Taylor Ltd, November 2022, Job No. 1018612 | To provide ICC with a district-wide liquefaction vulnerability assessment to identify areas of land potentially susceptible to liquefaction. The technical report and resulting map outputs will be used to inform building consent applications, along with land use and subdivision consents. | Not applicable | The available base information provides enough information for a Level A (basic desktop assessment) level of detail across the Study Area, and in some areas for a Level B (calibrated desktop assessment). The main factor controlling this level of detail is the spatial extent of the available geotechnical investigations and groundwater information across the Study Area. Further studies could be undertaken at higher levels of detail once additional information becomes available. The Coastal dunes and shoreline terrain is likely to comprise thick (> 5 m), Holocene-age deposits of sands and silts (which are susceptible to liquefaction) and are unlikely to contain a significant proportion of plastic sediments (which are not susceptible to liquefaction). These sediments are typically deposited in higher energy environments, which means the soils are likely to be denser than those found in lower energy environments. The densest soils are typically found within dune deposits adjacent to the open coast. Liquefaction analysis of existing subsurface data indicates these soils are susceptible to liquefaction to varying degrees. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high (such as terrace edges). | A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of the ICC Liquefaction Vulnerability report. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high. Three small areas of this terrain on the coastal side of the southwestern ranges have been classified as “Liquefaction Category is Undetermined” as the deposits are elevated and groundwater depth is unknown. | This assessment has been made at a broad scale across the district and is intended to approximately describe the typical range of liquefaction vulnerability across neighbourhood-sized areas. It is not intended to precisely describe liquefaction vulnerability at individual property scale. This information is general in nature, and more detailed site-specific liquefaction assessment may be required for some purposes (e.g., for design of building foundations). A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of this report. | 1032179.5288085938 | 9121.777762943913 |
| 2022-06-07 | 4 | Coastal dunes and shorelines | Possible | Undetermined | Liquefaction Vulnerability Assessment- Level A and B (basic and calibrated desktop assessment) | Tonkin & Taylor Ltd, PO Box 13 055, Christchurch 8141 | ‘Liquefaction Vulnerability Assessment’, Report for Invercargill City Council by Tonkin &Taylor Ltd, November 2022, Job No. 1018612 | To provide ICC with a district-wide liquefaction vulnerability assessment to identify areas of land potentially susceptible to liquefaction. The technical report and resulting map outputs will be used to inform building consent applications, along with land use and subdivision consents. | Not applicable | The available base information provides enough information for a Level A (basic desktop assessment) level of detail across the Study Area, and in some areas for a Level B (calibrated desktop assessment). The main factor controlling this level of detail is the spatial extent of the available geotechnical investigations and groundwater information across the Study Area. Further studies could be undertaken at higher levels of detail once additional information becomes available. The Coastal dunes and shoreline terrain is likely to comprise thick (> 5 m), Holocene-age deposits of sands and silts (which are susceptible to liquefaction) and are unlikely to contain a significant proportion of plastic sediments (which are not susceptible to liquefaction). These sediments are typically deposited in higher energy environments, which means the soils are likely to be denser than those found in lower energy environments. The densest soils are typically found within dune deposits adjacent to the open coast. Liquefaction analysis of existing subsurface data indicates these soils are susceptible to liquefaction to varying degrees. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high (such as terrace edges). | A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of the ICC Liquefaction Vulnerability report. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high. Three small areas of this terrain on the coastal side of the southwestern ranges have been classified as “Liquefaction Category is Undetermined” as the deposits are elevated and groundwater depth is unknown. | This assessment has been made at a broad scale across the district and is intended to approximately describe the typical range of liquefaction vulnerability across neighbourhood-sized areas. It is not intended to precisely describe liquefaction vulnerability at individual property scale. This information is general in nature, and more detailed site-specific liquefaction assessment may be required for some purposes (e.g., for design of building foundations). A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of this report. | 136801.9365234375 | 2267.3614757822943 |
| 2022-06-07 | 5 | Coastal dunes and shorelines | Possible | Possible | Liquefaction Vulnerability Assessment- Level A and B (basic and calibrated desktop assessment) | Tonkin & Taylor Ltd, PO Box 13 055, Christchurch 8141 | ‘Liquefaction Vulnerability Assessment’, Report for Invercargill City Council by Tonkin &Taylor Ltd, November 2022, Job No. 1018612 | To provide ICC with a district-wide liquefaction vulnerability assessment to identify areas of land potentially susceptible to liquefaction. The technical report and resulting map outputs will be used to inform building consent applications, along with land use and subdivision consents. | Not applicable | The available base information provides enough information for a Level A (basic desktop assessment) level of detail across the Study Area, and in some areas for a Level B (calibrated desktop assessment). The main factor controlling this level of detail is the spatial extent of the available geotechnical investigations and groundwater information across the Study Area. Further studies could be undertaken at higher levels of detail once additional information becomes available. The Coastal dunes and shoreline terrain is likely to comprise thick (> 5 m), Holocene-age deposits of sands and silts (which are susceptible to liquefaction) and are unlikely to contain a significant proportion of plastic sediments (which are not susceptible to liquefaction). These sediments are typically deposited in higher energy environments, which means the soils are likely to be denser than those found in lower energy environments. The densest soils are typically found within dune deposits adjacent to the open coast. Liquefaction analysis of existing subsurface data indicates these soils are susceptible to liquefaction to varying degrees. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high (such as terrace edges). | A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of the ICC Liquefaction Vulnerability report. In this terrain the potential for lateral spreading is consistent with the definition provided in the MBIE/MfE Guidelines (2017), that is in the presence of liquefaction-susceptible soils, lateral spreading is more likely to be possible in areas within 200 m of free faces more than 2 m high. Based on engineering judgement and in accordance with Section 4.5.2 of the MBIE/MfE Guidelines (2017), “…there is a probability of more than 15 percent that liquefaction-induced ground damage will be minor to moderate (or more) for 500-year shaking”. Therefore, the mapped Coastal dunes and shoreline terrain has been classified as “Liquefaction Damage is Possible.” | This assessment has been made at a broad scale across the district and is intended to approximately describe the typical range of liquefaction vulnerability across neighbourhood-sized areas. It is not intended to precisely describe liquefaction vulnerability at individual property scale. This information is general in nature, and more detailed site-specific liquefaction assessment may be required for some purposes (e.g., for design of building foundations). A key consideration of the liquefaction vulnerability categorisation undertaken in accordance with the MBIE/MfE Guidelines (2017) is the degree of uncertainty in the assessment. Discussion about the key uncertainties in this assessment is provided in Sections 3.3 and 3.4 of this report. | 3458786.759765625 | 24138.101378022024 |
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