2. Published Data¶
The data described below represents imagery surveys data openly available on the LINZ Data Service: https://data.linz.govt.nz/layer/95677-nz-imagery-surveys/
2.1. Schema: aerial_lds¶
Description: This schema contains datasets related to aerial imagery to be published on the LINZ Data Service.
2.1.1. Table: imagery_surveys¶
Description: This table holds the standardised attributes of aerial imagery surveys. These attributes were previously only contained within individual index tile layers with differing column names and data types.
Column Name Data Type Length Precision Scale Allows Nulls Description imagery_survey_id integer 32 No Unique identifier for the aerial_lds.imagery_surveys table. name varchar 100 No The corresponding aerial imagery layer name in the LINZ Data Service. imagery_id integer 32 Yes Foreign key to the aerial imagery layer identifier in the LINZ Data Service. index_id integer 32 Yes Foreign key to the index tile layer identifier in the LINZ Data Service. set_order integer 32 Yes The order that an aerial photograph displays within the NZ Aerial Imageryset. A null value indicates that the aerial photograph is not part of the set. ground_sample_distance numeric 6 4 Yes Ground sample distance in metres. accuracy varchar 100 Yes The overall accuracy of the imagery survey. This may contain aggregated accuracy values if accuracy varied throughout the survey. Refer to the related index tile layer for specific accuracies. supplier varchar 80 Yes The organisation that supplied the aerial imagery. licensor varchar 250 Yes The organisation that licenses the aerial imagery. flown_from date Yes The earliest date on which aerial photographs were taken as part of this imagery survey. flown_to date Yes The latest date on which aerial photographs were taken as part of this imagery survey. shape geometry Yes A dissolved multipart boundary of the coverage of the imagery survey.