From a07bf986d37526bc47be0722d7113461d25ebd06 Mon Sep 17 00:00:00 2001
From: Elisabetta D'Anastasio <e.danastasio@gns.cri.nz>
Date: Tue, 14 Apr 2026 17:16:59 +1200
Subject: [PATCH] feat: add changelog for GeoNet API

---
 data-access-changes/README.md     |  1 +
 data-access-changes/geonet-api.md | 51 +++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 data-access-changes/geonet-api.md

diff --git a/data-access-changes/README.md b/data-access-changes/README.md
index aac411e..12c911d 100644
--- a/data-access-changes/README.md
+++ b/data-access-changes/README.md
@@ -14,6 +14,7 @@ access type | impacted dataset
 [FITS to Tilde](fits-to-tilde.md)  | generic time series data and general overview of the migration
 [FITS to Tilde volcano monitoring data](fits-to-tilde-mapping.pdf) | manually collected volcano monitoring data
 [FITS to Tilde GNSS time series](gnss-time-series-access-change.md) | GNSS time series data
+[GeoNet API](geonet-api.md) | API to query miscellanous data and information from GeoNet
 
 
 
diff --git a/data-access-changes/geonet-api.md b/data-access-changes/geonet-api.md
new file mode 100644
index 0000000..c462ee7
--- /dev/null
+++ b/data-access-changes/geonet-api.md
@@ -0,0 +1,51 @@
+# GeoNet API (api.geonet.org.nz)
+
+## GeoNet API Network Sensor changes (March 2026)
+The GeoNet API endpoints that were providing information about the GeoNet sensor network have been reviewed and modified for improved usability. 
+
+Key changes:
+- additional sensor types can now be queried (e.g. cameras, environmental sensors, scandoas, geomagnetic sensors)
+- sensor types categories and associated numbering changed (client sensor search queries might be impacted)
+- seismic stations metadata endpoint updated (and details now queried from GeoNet metadata database (delta) and not GeoNet FDSN station service)
+- GNSS station metadata enpoint updated
+- Network Data endpoint updated (XXXX ADD MORE INFO HERE XXXXX)
+
+### Sensors types
+Sensor types listing reviewed to include additional types (and data domains). Numbering and categories have been reviewed.
+The endpoint to query sensor type is `https://api.geonet.org.nz/network/sensor/type`
+
+Previous API version was returing
+```
+1: Accelerometer
+2: Barometer
+3: Broadband Seismometer
+4: GNSS Antenna
+5: Hydrophone
+6: Microphone
+7: Pressure Sensor
+8: Short Period Borehole Seismometer
+9: Short Period Seismometer
+10: Strong Motion Sensor
+```
+
+New API version is returnig
+```
+1: Air pressure sensor
+2: Broadband seismometer
+3: Coastal sea level gauge
+4: DART bottom pressure recorder
+5: DOAS spectrometer
+6: Environmental sensor
+7: Geomagnetic sensor
+8: GNSS/GPS
+9: Lake level gauge
+10: Manual collection
+11: Short period seismometer
+12: Strong motion sensor
+13: Camera
+```
+
+### Sensor details
+
+
+### Sensor search