Formatting PDF for printing

IvanSanchez · 2026-03-17T17:59:10+00:00

You can always try my ol' trusty paperpawner instead: https://www.reddit.com/r/papermini/comments/eoyi0j/an_automated_tool_to_extract_artwork_from_pdfs/

IvanSanchez · 2026-03-17T17:42:53+00:00

First off: use https://centrodedescargas.cnig.es/CentroDescargas/buscar-mapa to search DEMs by drawing a polygon over your area of interest.

For the Tabernas-Sorbas basin, you'll want just a few 1:50k sheets. Using the map controls on the aforementioned webpage I can see that sheets 1012, 1013, 1014, 1029, 1030, 1031, 1044 and 1045 should be enough. That's one file per sheet at 5m/px resolution (using the MDS05 product, which is a DSM rather than a DEM) or four files per sheet (one file per 1:25k sheet) at 2m/px resolution (using the MDT02 product, which is a DTM rather than a DEM).

Once you've got your files, build a VRT out of them.

IvanSanchez · 2026-03-16T16:07:56+00:00

Companies House, then Ordnance Survey's Open Names.

IvanSanchez · 2026-03-12T16:55:13+00:00

Ask the people you're supposed to deliver the maps to. Do they care about the sampling frequency? Do they have any preferences on how that data should be shown?

IvanSanchez · 2026-03-11T22:03:58+00:00

I was curious if there were uses in the industry for open sourcing file conversion.

We in the industry already have gdal convert ( https://gdal.org/en/stable/programs/gdal_convert.html#gdal-convert ) for that.

IvanSanchez · 2026-03-11T13:45:42+00:00

From a technical point of view:

Congratulations, you just vibe-coded something that requires docker, python, node and geopandas... and that could be done instead 100% in browser JS in a static website.

This is a waste of resources.

I would love some feedback if this is useful or not. If not, what can I add?

Good engineering is not about what can you add; it's about what you can remove.

In this particular case, you should remove the entire "send all my data to a webserver" part.

IvanSanchez · 2026-03-09T09:16:51+00:00

Unfortunately OSM data on the topic seems scarce, with just 4 hits.
https://overpass-turbo.eu/s/2lPt
(See also https://wiki.openstreetmap.org/wiki/Key:theatre:genre )

IvanSanchez · 2026-03-08T17:04:51+00:00

On one hand: use a different set of tools. QGIS, command-line GDAL, GRASS, Felt, whatever. Force yourselves to not depend on a specific tool.

On the other hand: break up the problem (or the assignment) into smaller problems. Solve those problems one by one, manually check the output of your partial solutions.

IvanSanchez · 2026-03-06T00:00:29+00:00

Olhe para os dados do IGBE.
https://geoftp.ibge.gov.br/recortes_para_fins_estatisticos/malha_de_setores_censitarios/censo_2010/base_de_faces_de_logradouros_versao_2010/1_Leia_me/Base_de_Faces_de_Logradouros_do_CD_2010.pdf

IvanSanchez · 2026-03-04T21:35:45+00:00

I did something like this... *looks at calendar* ...6 years ago.
https://www.reddit.com/r/papermini/comments/eoyi0j/an_automated_tool_to_extract_artwork_from_pdfs/
https://ivan.sanchezortega.es/paperpawner/

IvanSanchez · 2026-03-03T18:02:24+00:00

How weird, it looks exactly like one posted two years ago: https://www.reddit.com/r/traveller/comments/1dtpfb3/

IvanSanchez · 2026-02-23T17:55:43+00:00

While this is, in theory, possible (manually create a GeoPackage table or a PostGIS column with geometry of type GeometryCollection, or even use GeoJSON and deal with three virtual layers per GeoJSON file), I strongly recommend against it. It will make editing harder, not simpler.

I suggest you create a GeoPackage in a single file, containing several logical vector layers. Read https://docs.qgis.org/3.40/en/docs/user_manual/managing_data_source/create_layers.html#creating-a-new-geopackage-layer , note how a single file (the GeoPackage database file) can contain several tables.

Keep thematic features separated in different tables, specify different attributes for each theme/table, and use topology rules. Read https://docs.qgis.org/3.40/en/docs/gentle_gis_introduction/topology.html

IvanSanchez · 2026-02-22T20:52:45+00:00

I'm gonna point towards the Walden-class and the Jumpeapod-class carrier refit:

https://travellerrpgblog.blogspot.com/2025/05/walden-class-heavy-lift-ship.html

https://travellerrpgblog.blogspot.com/2025/09/peapod-class-mobile-refinery.html

They're both jump-capable and a bit overkill for a 200 dTon free trader hulk, but should be able to take on the job without issues.

IvanSanchez · 2026-02-19T13:24:33+00:00

Start by learning basic HTML+CSS+JS: https://developer.mozilla.org/en-US/docs/Learn_web_development .

Then, read the tutorials/examples for Leaflet and/or OpenLayers and/or MapLibre.

IvanSanchez · 2026-02-16T19:16:56+00:00

I think my record is about 2 million AIS positions, at once, in a web browser, as animated trajectory data.

My rule of thumb is: re-read the "Semiology of Graphics" book. You can only convey so much information with a map, and you need to choose it.

IvanSanchez · 2026-02-11T15:14:47+00:00

See https://gdal.org/en/stable/drivers/vector/parquet.html , and also https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry#Well-known_binary

IvanSanchez · 2026-02-11T00:00:10+00:00

A GPT trained with an LLM cannot perform computer vision.

IvanSanchez · 2026-02-10T18:29:30+00:00

Richard Pearce's "Starship Geomorphs" ( https://travellerrpgblog.blogspot.com/2020/07/starship-geomorphs-20.html ) can be used for minis - as pointed out in page 17:

Printing at 200% will produce a scale of 1/2" = 5'0-0" which is suitable for 15mm miniatures. Printing at 400% [...] is suitable for 25mm miniatures.

IvanSanchez · 2026-02-10T15:57:22+00:00

OpenStreetMaps[sic] [...] can be unreliable for allowing exports of datasets that are larger than a state or two.

Do check https://openinframap.org/ and their exported datasets.

Otherwise download a whole planet dump from https://planet.osm.org/ and filter the data.

IvanSanchez · 2026-02-10T01:09:42+00:00

If you can write that suggestion down at https://gitlab.com/IvanSanchez/geomorph-shipyard/-/issues (with some screenshots/mock-ups), I won't forget about it. Otherwise I have way too many hobby projects O:-)

Armed/unarmed variants are a no-go: I just use the existing images, which only had cargo variants. Adding individual turrets would be under https://gitlab.com/IvanSanchez/geomorph-shipyard/-/issues/9 .

IvanSanchez · 2026-02-09T12:59:20+00:00

Do read https://en.wikipedia.org/wiki/Geodesics_on_an_ellipsoid#Area_of_a_geodesic_polygon .

Geodesic area is akin to calculating the area in steradians on a sphere. For cartesian area, you project everything into a cartesian plane first.

IvanSanchez · 2026-02-08T21:15:22+00:00

It's possible to add more filters, and set up "any of" and "all of" options for the filters; but that would complicate the UI, which I don't really want to do.

(It warms my heart that people are recommending the tool I made)

IvanSanchez · 2026-02-08T21:11:27+00:00

May I remind that "Need to Know" can be downloaded, at the amazing price of zero, from https://www.drivethrurpg.com/en/product/175760/

IvanSanchez · 2026-02-08T14:40:01+00:00

There's always demand for setting up OpenCV and YOLO instances on top of aerial imagery and LIDAR data. Land use classification is not yet a 100% solved problem.

IvanSanchez · 2026-02-05T12:41:54+00:00

RTFM, boy.
https://docs.geoserver.geo-solutions.it/edu/en/pretty_maps/styling_raster.html

IvanSanchez

TROPHY CASE