North Island 0.5m Cyclone Gabrielle Satellite Imagery (2023)

North Island 0.5m Cyclone Gabrielle Satellite Imagery (2023)

Toitū Te Whenua Land Information New Zealand

2023

**A record of the Cyclone Gabrielle severe weather event of February 2023.**

This 0.5m resolution satellite imagery was captured 21st February 2023 NZDT by Chang Guang Satellite Technology Co Ltd and supplied by Critchlow Geospatial. LINZ processed this R G B version of supplied B G R NIR satellite imagery for publishing on the LINZ Data Service and Basemaps, see Lineage statement in the Metadata for more details.

Data comprises:
• 288 ortho-rectified RGB GeoTIFF images in NZTM projection.
• Satellite: JL1KF01B
• Spatial resolution: 0.5m

The supplied imagery is in terms of New Zealand Transverse Mercator (NZTM) map projection.

Additional services:
• [LINZ Basemaps](https://basemaps.linz.govt.nz/?i=north-island-2023-0.5m#@-39.5972231,176.9073485,z6.9017) for WMTS and XYZ services
• [ArcGIS Online](https://linz.maps.arcgis.com/home/item.html?id=200d4d6da9db4d3eb93da3eb9ce2edd7) for ArcGIS REST service

Index tiles for this dataset are available at layer [North Island 0.5m Cyclone Gabrielle Satellite Imagery Index Tiles (2023)](http://data.linz.govt.nz/layer/112808)

Approximately 43290sq km supplied by Chang Guang Satellite Technology Co Ltd under a CC-BY 4.0 license.

*Satellite/Constellation name*
JL1KF01B (EarthScanner) - part of the Jilin-1 suite of satellites operated by Change Guang Satellite Technology Co Ltd, Jilin, China.

*Resolution*
0.5m Pansharpened Multispectral
- 0.5m Panchromatic
- 2.0m Multispectral

*Swath*
150km wide

*Scene/Tile Size*
15km x 15m

*LINZ Processing*
LINZ processed supplied B G R NIR 4-band 16-bit images by:
- removing the near-infrared band
- flipping the remaining bands to R G B
- replacing black pixels in nodata areas with an alpha band
- scaling each band individually to achieve closer to natural colour
- converting 16-bit to 8-bit
- reprojecting from WGS 84 UTM 60 to NZTM

-41.625997930033776 175.27007051531365 -37.52027864932792 178.56695581381265

https://data.linz.govt.nz/layer/112807-north-island-05m-cyclone-gabrielle-satellite-imagery-2023/

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