Name: Wetlands

Display Field: SiteName

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Last update: September 2025This is an amalgamated dataset of wetland surveys done at different times and by different organisations. Each survey has different attribute fields and where the attribute fields record the same information this may take different forms.This data layer has been created using aerial imagery, LiDAR elevation data, and existing wetland geospatial information. While it provides a useful indicator of where wetlands are likely to occur, on-the-ground verification is necessary to confirm wetland locations, define boundaries, and determine relevant rules under local plans and legislation.The dataset has taken the most common/useful attribute information from all the surveys but this means not all the wetland polygons will have information for all attribute fields. All polygons have a value for Original Layer and Original ID so the information can be tracked back to it originating survey.Process to amalgamate datasets:Since none of this data has been field checked (except that which came from the original WetlandExtents layer) the rule is the we hold the greatest possible wetland extent and that newer surveys 'replace' older surveys.Check the attribute table able match the fields to those already in the Wetland attribute table. If there are attributes in the new data that do not already have an equivalent in this dataset and the information in these fields is important create new fields in this dataset. If there is already an equivalent field don't create another one. If the data in an equivalent field is in a slightly different form but giving the same information keep the data in the form as it came in the survey. E.g. field WetlandExotic in some surveys holds words such as Exotic and Native and in other surveys holds a % exotic vegetation. Both go into the same field and stay in the same form - just at a % sign for the percentages so it is clear. Hoever if there is a fields like IsExotic which holds a 1 for exotic vegetation and a 0 for native change this to the words as it is confusing.Create a copy of the new survey with all the fields as in the Wetland SDE layer and match the fields so the right information goes into the right field.Create a copy of the Wetland SDE layer to work onFill in the WMA, FMU, and OriginalLayer fields.Make sure each wetland has an OriginalID if this is not already in the survey data. If not - create it in the original dataset so we can match it back in the futureFind any wetlands that match a wetland already in the data that has a WetlandID. This ID is the one that all polygons of the same wetland will have and links back to the original WetlandExtents layer although other wetlands may get a WetlandID and a SiteName over time. Fill in the WetlandID and SiteName, Locality etc. for these known wetlands.Clean the data to remove any overlaps and gapsErase the new data from the old data so you are left with holes in the old data that match the new data.Explode the erased data, select any polygons with an area &lt;= 50m2 and delete these. Deissolve the erased data by all fields except ObjectID, Shape_Area and Shae_Length to merge all wetlands back togetherAppend the new data into the erased data. This will amalgamate the new survey into the original data without overlaps and keeping any extra areas/extra wetlands that were previously identified but may not have been in the new survey.This data has been published publicly (probably just the prod data) as a hosted feature service in AGOL so this will also need to be updated.Datasets used to create this layer:Tarawera WMA Wetland AreasMapping completed: 2024Survey done by: Pattle Delamore PartnersReport: TARAWERA WMA WETLAND MAPPING 2024. Martina Smith (martina.smith@pdp.co.nz). Original dataset: Tarawera  WMA wetland areas final data.Tauranga Harbour Wetlands FinalMapping complete: 2023 Survey done by: Morphum Environmental LtdReport: Tauranga Harbour Wetland Mapping 2023Original dataset: Tarawera_WMA_Wetland_Areas<SPAN  STYLE="font-weight:bold;text-decoration:underline;">Kaituna WMA Wetland Areas AllMapping complete: 2023 Survey done by: Pattle Delamore PartnersReport: KAITUNA, MAKETŪ AND PONGAKAWA WMA WETLAND MAPPING 2023. Marinus Boon (mboon@lynker.com, contact@pdp.co.nz, martina.smith@pdp.co.nz).Original dataset: Wetland  mapping\Kaituna_WMA_Wetland_Mapping (1)\Wetland_Areas.gdb\Kaituna_WMA_Wetland_Areas_AllTauranga WMA Wetlands SL1809 V01Mapping complete: 2019Survey done by: Manaaki Whenua Landcare ResearchReport: Wetland extent mapping: Tauranga Water Management Area; November 2018; Manaaki Whenua Landcare ResearchOriginal dataset: AA  SHAY cdrive\Desktop\SL1809_Tauranga_WMA_Wetlands_Release_V01\SL1809_Tauranga_WMA_Wetlands_Release_V01.gdb\Tauranga_WMA_Wetlands_SL1809V01Kaituna WMA Wetlands SL1809 V01Mapping complete: 2019Survey done by: Manaaki Whenua Landcare ResearchOriginal dataset: Kaituna_WMA_Wetlands_SL1809_V01<SPAN  STYLE="font-weight:bold;text-decoration:underline;">Whakatane WMA Wetlands SL2017 V01 FiliteredMapping complete: 2019/2020Survey done by: Manaaki Whenua Landcare ResearchOriginal dataset: Heather  MacKenzie\NERMN\Wetlands\Wetland Extent Mapping\WMAs\SL2017_Whakatane_Wetlands_Release_V01.gdb.zipTarawera WMA Wetland SL2014 V01 FilteredMapping complete: 2019/2020Survey done by: Manaaki Whenua Landcare ResearchOriginal dataset: Heather  MacKenzie\NERMN\Wetlands\Wetland Extent Mapping\WMAs\SL2014_Tarawera_Wetlands_Release_V01.gdb.zipEast Coast WMA Wetlands SL2013 V01 FilteredMapping complete: 2019/2020Survey done by: Manaaki Whenua Landcare ResearchOriginal dataset: Heather  MacKenzie\NERMN\Wetlands\Wetland Extent Mapping\WMAs\SL2013_EastCoast_Wetlands_Release_V01.gdb.zipWaioeka Otara WMA Wetlands SL2012 V01 FilteredMapping complete: 2019/2020Survey done by: Manaaki Whenua Landcare ResearchOriginal dataset: Heather  MacKenzie\NERMN\Wetlands\Wetland Extent Mapping\WMAs\WaioekaOtara_Wetlands_Release_V01.gdb.zipOhiwa WMA Wetlands SL2001 V01 FilteredMapping complete: 2020Survey done by: Manaaki Whenua Landcare ResearchOriginal dataset: Heather  MacKenzie\NERMN\Wetlands\Wetland Extent Mapping\WMAs\SL2001_Ohiwa_Wetlands_Release_V02.gdb.zipRotorua WMA Wetlands SL1901 V01 FilteredMapping complete: 2019Survey done by: Manaaki Whenua Landcare ResearchOriginal dataset: 591883_ArcPro.gdb<SPAN  STYLE="font-weight:bold;text-decoration:underline;">Rangitaiki WMA Wetlands SL1914 V01 FilteredMapping complete: 2019Survey done by: Manaaki Whenua Landcare ResearchOriginal dataset: SL1914_Rangitaiki_Wetlands_Release_V01.gdb<SPAN  />

Service Item Id: fc0e2f267d524609bd3cf3a80a53e170

Copyright Text: Manaaki Whenua Landcare Research - Robbie Price, Neil Fitzgerald, Scott Bartlam

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Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• WetlandID ( type: esriFieldTypeSmallInteger, alias: Wetland ID )
• SiteName ( type: esriFieldTypeString, alias: Site Name, length: 65 )
• Locality ( type: esriFieldTypeString, alias: Locality, length: 255 )
• Significance ( type: esriFieldTypeString, alias: Significance, length: 50 )
• SharepointLink ( type: esriFieldTypeString, alias: Sharepoint Link, length: 1000 )
• Hydrosystem ( type: esriFieldTypeString, alias: Hydrosystem, length: 50 )
• WetlandClass ( type: esriFieldTypeString, alias: Wetland Class, length: 50 )
• WetlandStructure ( type: esriFieldTypeString, alias: Structural Class, length: 50 )
• WetlandExotic ( type: esriFieldTypeString, alias: Exotic Vegetation, length: 50 )
• Confidence ( type: esriFieldTypeString, alias: Confidence, length: 20 )
• ConfidenceReason ( type: esriFieldTypeString, alias: ConfidenceReason, length: 100 )
• Notes ( type: esriFieldTypeString, alias: Notes, length: 255 )
• BogPct ( type: esriFieldTypeSmallInteger, alias: Bog (%) )
• FenPct ( type: esriFieldTypeSmallInteger, alias: Fen (%) )
• MarshPct ( type: esriFieldTypeSmallInteger, alias: Marsh (%) )
• SwampPct ( type: esriFieldTypeSmallInteger, alias: Swamp (%) )
• SaltMarshPct ( type: esriFieldTypeSmallInteger, alias: SaltMarsh (%) )
• WaterPct ( type: esriFieldTypeSmallInteger, alias: Water (%) )
• OtherPct ( type: esriFieldTypeSmallInteger, alias: Other (%) )
• OriginalID ( type: esriFieldTypeSmallInteger, alias: Original ID )
• OriginalLayer ( type: esriFieldTypeString, alias: Original Layer, length: 100 )
• WMA ( type: esriFieldTypeString, alias: Water Management Area, length: 50 )
• FMU ( type: esriFieldTypeString, alias: Freshwater Management Unit, length: 50 )
• NPSStatus ( type: esriFieldTypeString, alias: NPS Status, length: 50 )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
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