I stumbled upon a lego map in twitter and I thought it was quite fun and I should do something similar:
And here’s the result. One with NaturalEarth data colours for height, and another one with a set of official lego colours 😀
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NOTE from the future:
Since everybody in twitter was to keen to remind me, First the map in EPSG:25831, then in 4236 😀
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This book can be summarized by: Excellent text about projections, also a very dry read.
I understand the aim of it, more of a history on map projections, the importance of them on a given period of time, and what they brought to the table.
As a scholar text it is really complete and thorough (there’s up to 35 pages of referenced works). As something to read from beginning to end it is quite boring. It’s better to read bit by bit when you feel like it. And be ready to concentrate on the contents, otherwise most of what it tries to tell you will just go over your head.
The book contents are plain but beautiful, full renderings of different map projections help give you an overview on how older maps were built. But at the same time I miss some real scans of old maps where we can see those projections in use. Being a history book would be really nice to present both a rendering alongside a real scan. The few cases where a scan is next to the rendering provide a good context to the projection.
Can’t finish this without commenting about fun excerpts of old descriptions of the projections, for example Ptolemy‘s take on his favourite projection:
(…) Although for these reasons this method of drawing the map is the better one, yet it is less satisfactory in this respect, that it is not as simple as the other…. for me both here and everywhere the better and more difficult scheme is preferable to the one which is poorer and easier, yet both methods are to me retained for the sake of those who, through laziness, are drawn to that certain easier method (…)
— Translation From Stevension 1932,
Full projections are described using this really old language as an example on how the knowledge was passed along before modern mathematics. Luckily, alognside those there’s a description from the author (John P. Synder) which makes everything much clearer.
Not a book I would recommend to everyone, but a really cool book to have in your bookshelf for some short bursts of reading.
I did not finish reading this book yet. I’ve read the renaissance projections chapter and skimmed the nineteenth century projections chapter. (2 of 4 total chapters). Missing chapters on 1670-1799 and the twentieth century.
Well, it didn’t take that much. I ported the small Qgis plugin to Qgis version 3.x. Luckily the renderer classes did not change, so the biggest thing to do was reorganize the code for PyQt5 and all the Qgis2 to Qgis3 API breaking changes. Just one coffee and a morning was enough :-).
It should be available from the qgis repository itself.
Original Post
2.X update
Plugin at the Qgis plugin website
Plugin source
Something like 7 years ago I created a very small plugin for Qgis (V1.x and V2.x later on).
This plugin was available via my github on a clone and copy fashion.
Yesterday I stopped being lazy and fixed that, The plugin is now available directly from the QGis plugin servers. And can be installed from Qgis itself.
Although I’m late as always since It does not work on 3.x versions.. oh well (look at this changelist!).
Original Post
2.X update
Plugin at the Qgis plugin website
Plugin source
A year ago, my sister gave me an awesome present. A big set of small card-sized photos with a set of the highest mountains of Catalunya. The idea is to write on the back when and with whom I “climbed” that mountain.
Last Easter I was planning which closer hikes could I do during the holidays, so I can start filling each card (feels like gotta climb em’ all). It was difficult to know each mountain location from the cards, I fired Google Earth for Linux and started creating points.
It was very easy with the famous ones, since Google Earth finds them directly (Pedraforca, Pica d’estats, etc..), but more obscure ones are a no-no. So I needed extra support to map them.
Mountain Cards
I am pleased to announce the DBPedia Places map. Since I wrote my master thesis about vague places I wanted to do something like this. The vague-places generator was one of the outputs of such work, but I felt the need to see DBpedia points on a map, changing every day.
The final result can be poked at the dbpediamap.tk, this post is an overview of how this small project works.
As a quick taste, here’s a screenshot showing a dataset presented on the website:
DBpedia viewer USA
Castells 