Viewing profile — blacha

Those comments were more at pastmaps. For elevation data, we store our DEM/DSM in S3 as LERC [1] COGS, LERC has a WASM bundle which I think can be used in the browser. We found LER…

Your browser has a very powerful image decoder built into it, offloading the PNG decoding into Javascript is very resource hungry. Using maplibre (or any map viewer) you can load b…

I don't think geojson is a great format for anything with more than a few MB of data. I wanted to see exactly how bad it is with a largeish datasets, so I exported the New Zealand …

if you also wanted to pull in a node framework for deserilization you could import something like `zod` to have the similar level of nice error messages when invalid input is encou…

New Zealand regularly uses flying companies to take aerial imagery photos of most of the country, which is generally taken between 30cm and ~2cm, Land Information New Zealand (LINZ…

are your orthomosaics geo refernced? You could look at storing them as a cloud optimised geotiff (COG) and then adding them directly into your web map.

> Why not upload those files separately, Doing S3 put requests for 260M files every week would cost around $1300 USD/week which was too much for our budget > or in ZIP format? We l…

This is basically exactly what we do we have created a cloud optimised tar (cotar)[1] by creating a hash index of the files inside the tar. I work with serving tiled geospatial dat…

New Zealand has 8G/8G to some homes within bigish cities for around $270nzd/mo (~180usd/mo)[1] and most of the population has access to at least 1000up/500down fibre for about $100…

looks to be using open sea dragon [1] This is just a tiled map so any web mapping software would also work OpenLayers, Leaflet, Maplibre etc. [1] https://openseadragon.github.io/

Looks to be a service to remove the HTTP referer header when linking to other sites. Say your on example.com and click a a link to foo.com the browser will send the http header `Re…

New Zealand, with our borders closed my company has had multiple job ads open for intermediate/senior developers for over a year. Every candidate we do interview, generally also ha…

This is pretty much exactly what we do to serve aerial/satellite imagery maps. We convert the imagery into Cloud optimised geo tiffs and store them in S3 https://www.cogeo.org/ the…

You can generally query any object off s3 in a few milliseconds.. I have a system doing 10s-100's of millions of reads a day from s3 with very consistent and fast read times.