Jonny Dawe
LightNews LightNews
banner
jonnydawe.github.io
Jonny Dawe
@jonnydawe.github.io
220 followers 480 following 79 posts
Maps, Apps & Sea Ice | GIS Dev
Posts Replies Media Videos
jonnydawe.github.io
I've created an open-sourced version of my logic for accessing a nmea feed on a usb gps device (or any nmea serial port!) Take a look here: github.com/antarctica/n...
GitHub - antarctica/nmea-web-serial: NMEA 0183 library for the Web Serial API. Generic adapter pattern, XState state management, and framework-agnostic client API. Perfect for marine navigation, GPS t...
NMEA 0183 library for the Web Serial API. Generic adapter pattern, XState state management, and framework-agnostic client API. Perfect for marine navigation, GPS tracking, and IoT applications. - a...
github.com
November 12, 2025 at 5:59 PM
jonnydawe.github.io
Recently I stumbled upon the web serial api! Supported in Chromium browsers, it allows you to hook into a devices attached to serial ports on your machine through the browser! I've implemented logic to read in a gps nmea stream directly into our SIIS web app!
November 11, 2025 at 1:15 PM
jonnydawe.github.io
More timelines! Two way interaction between our custom Imagery Collection Layer and the timeline! #timelines #arcgisdev
October 31, 2025 at 4:02 PM
jonnydawe.github.io
Working on adding some timeline user interface components to simplify the process of choosing relevant data. In this case we a bring COGs directly into the app from a STAC api! #arcgisdev
October 29, 2025 at 4:25 PM
jonnydawe.github.io
Building a timeline using d3.js. Sometimes its easier to roll your own then search for that golden goose library that someone else has built! Pretty much unstyled at the moment, but has the functionality I need for handling interactions.
October 1, 2025 at 4:31 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
Made primarily of polystyrene they weigh just 1.6 kg on take-off, but despite this they are capable of operating in the stronger winds we experience down in the Antarctic with a maximum continuous wind limit of 17 m/s. In fact, yesterday we clocked a top ground speed of >63 mph!

2/2
A photo of a man launching the ebee UAV in a grassy field. There are trees in the distance and white fluffy clouds in a blue sky. A photo of 2 men, one of them holding an ebee UAV, in a grassy field. There are trees in the distance and white fluffy clouds in a blue sky.
August 1, 2025 at 3:59 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
MAGIC was out test flying our eBee VISION platforms in advance of the upcoming Antarctic field season this week. The eBee VISION UAVs can fly for 90 minutes and operate up to 20 km from the pilot. Here's a short clip of one of them in action! 🛩️

1/2
August 1, 2025 at 3:59 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
Lots of dots! These are spot heights generated for our Air Operations Planning Maps, using REMAv2 2m tiles. Next steps are to clean up the density, add existing GPS points & then add them to our maps, which are used for planning by pilots across the continent. The data will then be openly published!
A screenshot of 59,261 spot heights in West Antarctica and the Antarctic Peninsula. This is the initial version, before reducing the density. Each point is shown as a red dot, the coastline of Antarctica is displayed as a grey line, and the yellow squares are the extent of some of the REMA tiles.
July 30, 2025 at 9:09 AM
Reposted by Jonny Dawe
magic.bas.ac.uk
We are currently hosting an intern digitising ice floes from satellite radar (SAR) imagery in the Weddell Sea.
The resulting labelled data will be used in the NERC DEFIANT and QUASAR projects to assess the performance of machine learning methods and quantify errors in sea ice concentration data.
A screenshot of a SAR image at the north-east end of the Antarctic Peninsula. The digitised ice floes are highlighted in semi-transparent green. The image is from 31st Dec. 2020. A zoomed in portion of the SAR image in the Weddell Sea. The digitised ice floes are highlighted in semi-transparent green. The image is from 31st Dec. 2020.
July 24, 2025 at 2:27 PM
jonnydawe.github.io
Just finished building a gazetteer search component on top of the ArcGIS SearchViewModel! Its running off of a set of geoserver WFS services with a custom locator layer source! Working really neatly! #ArcGIS #Maps
July 24, 2025 at 5:05 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
We have been working along with engineers from Phase One and Rocky Mountain Aircraft over the past week to install and test our new Phase One PAS aerial camera into BAS's Twin Otter aircraft. 🛩️

1/3
A photo of BAS's red Twin Otter plane in a hangar/workshop. A Canadian flag can be seen in the background.
July 14, 2025 at 1:34 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
Did you know that it's possible to follow the RRS Sir David Attenborough on @bas.ac.uk's website? We provide the maps and location tracking to underpin this. 🚢🗺️

See the latest position of the ship here, on its way north after a long season in Antarctica! www.bas.ac.uk/polar-operat...
A screenshot of a map showing the location of the RRS Sir David Attenborough, travelling north off the west of Africa. A globe inset shows the location in a wider context.
July 9, 2025 at 4:30 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
This week we have been at a @polomints.bsky.social project meeting, planning details of how to use fixed stereo cameras, RPAS and our new air camera to monitor calving of the Sheldon Glacier on Adelaide Island. For more information visit polomints.ac.uk.
Photo looking from Stork Ridge down to Sheldon Glacier showing part of the view that our fixed cameras will capture. The image shows the view from a rocky outcrop looking down on a crevassed glacier with water in front of small icebergs are floating in the water.
July 4, 2025 at 1:50 PM
jonnydawe.github.io
Whilst updating an app to the latest version of the ArcGIS JS API (4.33) we picked up a minor regression in labelling for a super niche situation. I would call that one epic win for our automated testing setup! Check out our setup here: github.com/antarctica/e... #Arcgis #Dev #Playwright
A snapshot of a map application showing the pixel difference highlighted during an automated testing run. The difference shows that some labels are no longer being rendered on the map at certain positions.
July 3, 2025 at 5:11 PM
jonnydawe.github.io
I always like to get in early with implementing a responsive UI - usually it means that the actual extra code is pretty minimal! #arcgis #responsive
June 25, 2025 at 3:02 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
We're hiring a GIS and Mapping Specialist to manage our Geospatial Helpdesk and to contribute to our Topographic Map Series.

This is a really exciting opportunity at the British Antarctic Survey to support colleagues across the organisation. Details here: shorturl.at/bA4fd #GISjobs
6 small maps of regions in Antarctica and South Georgia. These are examples of typical Helpdesk outputs from the job being advertised. Each map contains place names, bathymetry in shades of blue, and terrain details on land. A map of Signy Island, South Orkney Islands. This map is part of our BAS Topographic Map Series. Bathymetry is shown in deepening shades of blue. Details on the land include ice and moraine extent, lakes, contours, and place names.
June 25, 2025 at 8:31 AM
jonnydawe.github.io
We've been developing a new application with ArcGIS Maps SDK to create a simple UX for exploring our imagery archive - We pull on lots of the existing widget view models but tweak them to create out own workflow and design system. Map and workflow logic is orchestrated by XState. #arcgis #arcgisdev
magic.bas.ac.uk Mapping and Geographic Information Centre @magic.bas.ac.uk · Jun 24
We’re developing a prototype web portal to explore British Antarctic Survey’s aerial photography archive 📸 ✈ Search by place or flight line, view results on the map, and access decades of contextual survey data. A step toward making this unique Antarctic record more discoverable & easier to explore!
June 24, 2025 at 10:20 AM
Reposted by Jonny Dawe
magic.bas.ac.uk
Great to see our map used by UK Foreign Secretary Rt Hon David Lammy and Espen Barth Eide during their visit to the @ukarcticoffice.bsky.social in Ny-Ålesund recently. With summer/winter versions, it shows how fast the region changes and why frequent, detailed mapping in the Arctic is so important.
A photo of Dr Robert Mulvaney showing a map of of Ny-Ålesund and the Kongsfjorden region in Svalbard to visitors at the NERC Arctic Office. The visitors include the UK Foreign Secretary Rt Hon David Lammy and his Norwegian counterpart Espen Barth Eide. The photo shows 5 people stood around a map laid on a table, with one man filming.
June 12, 2025 at 4:05 PM
jonnydawe.github.io
Rebecca Hendin on Labour’s reinstatement of winter fuel payments – cartoon
Rachel Reeves’s U-turn means that the threshold over which pensioners are no longer eligible for payment will rise before winter
www.theguardian.com
June 10, 2025 at 4:50 PM
jonnydawe.github.io
Just finished a little refresh of Sewagemap.co.uk. Added a fun loader, and additional layer filtering bits and bobs! It continues to show a bleak picture of sewage overflow in the uk... 💩😔 #sewage #uk #arcgis
Sewage Map
Real-Time Sewage Discharge Monitoring | Sewage Map - Stay Updated on Sewage Pollution
Sewagemap.co.uk
May 29, 2025 at 6:59 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
A few months ago, we surveyed Rothera Point using our fixed-wing eBee-X UAV. We've now processed the data and produced this beautiful, orthorectified mosaic, as well as a Digital Elevation Model.
We carry out these surveys every year, allowing all of BAS to work with current and accurate data!
An image of Rothera Research Station, Rothera Point, on Adelaide Island. There is a bright blue building in the centre of the image which is the new Discovery Building. You can also see patches of snow on the point, and there are small icebergs floating in the surrounding water. A zoomed in portion of the image, showing the northern end of the runway and the hangar. A white and red plane can also be seen, parked next to the hangar. A zoomed in photo of the plane. The plane is red and white. It is possible to see skis in front of it, probably removed from the plane as it continues its journey north away from Antarctica.
May 29, 2025 at 9:55 AM
Reposted by Jonny Dawe
strange.website
Text reads "eternal reminder that you may go to settings and then accessibility to enable required alt text, so you'll never forget again. it's the right thing to do."
May 27, 2025 at 5:48 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
We're proud to share that our Bedmap3 map won "Best Map" at the International Map Industry Association (IMIA) forum in London last week! 🏆
This international award celebrates Outstanding Cartographic Design & we’re honoured to be recognised alongside leading names in the field from previous years. 🗺️
A photo of the trophy and certificate, with side A of the Bedmap 3 map shown behind. The map shows the bed topography of Antarctica underneath the ice.
May 21, 2025 at 3:21 PM
Reposted by Jonny Dawe
magic.bas.ac.uk
It has been a busy week for conferences this week! One of our GIS Specialists presented at the IMIA Mapping Leaders Forum in London yesterday. It has been a useful few days talking to some world-leading map publishers and printers and we’ve gained lots of ideas on how we can do more with our maps!
Vivien Godfrey introducing the 2 day event. There are round tables with people sitting around them, and 3 screens at the front. Showing our map of of ‘The Shackleton Crossing’ route on South Georgia to someone. Photo taken by David at SplashMaps. A view of London. Many tall buildings can be seen and the sky is a bright blue. A photo of the News Building with the Shard behind it. The event is taking place at Harper Collins, inside the News Building.
May 15, 2025 at 12:48 PM
Reposted by Jonny Dawe
polargeospatial.bsky.social
Effective immediately, the PGC is no longer accepting new NSF-supported requests due to a lack of renewal funding. Current work is wrapping up. Please contact your NSF program officer if impacted. We’re grateful to have supported your polar research. Read our full statement at www.pgc.umn.edu
May 5, 2025 at 9:33 PM