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ljegou

45 karma · joined April 3, 2010

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ljegou··on Mapping hospital accessibility with OpenStreetMap
The Malaria Atlas Project worked on a global hospital accessibility dataset, base on OSM roads + other data :

Travel Time to Nearest Healthcare Facility with Access to Motorized Transport https://data.malariaatlas.org/maps?layers=Malaria:202206_Glo...

Paper : https://researchonline.lshtm.ac.uk/id/eprint/4657237/1/weiss...

ljegou··on Ask HN: Which tool do you use to create beautiful diagrams?
OmniGraffle works well for me. (MacOS)
ljegou··on French Universities Cancel Subscriptions to Springer Journals
It's coming : https://www.openaire.eu/france-final-text-of-the-law-for-oa-...
ljegou··on World air pollution map
The large circles often mask the little ones. No legend, no symbol scale, no color scale. That's not how you do thematic cartography.
ljegou··on Merry Christmas to HN
Joyeux noël :)
ljegou··on How a Shrimp Treadmill Became a Political Plaything
And her hatred about France (at the time) too.
ljegou··on Rendering the world
Interesting. Still nothing about the ridiculous Mercator projection.
ljegou··on Lost city of Atlantis, swamped by tsunami, may be found
Old 2004 news ? : http://news.bbc.co.uk/2/hi/science/nature/3766863.stm
ljegou··on Ask HN: What are the best technologies you've worked with this year?
- WebServices, to provide access for R, Python, and spatial calculations (WPS norm). Complex calculations without installing any client software, anywhere with an Internet connection.

- PostGIS raster capabilities (at last some raster storage and computing inside the database).

- Devon:Think / Bookends / Nisus Writer : Scientific papers and books intelligent storage, bibliography management and scientific writing.

ljegou··on [dead]
And repeated letters are lame and childish (but we have been spared the exclamation points).
ljegou··on Wondering if you are getting a CR-48? Look for your zipcode here.
Yes, what a pity it's reserved to US citizens :/
ljegou··on The New York subway-map wars, continued
Thanks for this very interesting report of the conference. The positions and arguments are well and shortly exposed. The boundary between diagram and geographical map is in question with subway "maps", and the graphic design is still a challenge.

I'm glad to see that the subject of map design is alive and expanding with new media. However, i'd like to see more references to semiology and perception psychology :-)

ljegou··on Version Control for Writers
I'm more interested by the versioning function. For book-size manuscripts i work chapter by chapter + annexes.
ljegou··on Version Control for Writers
I love the idea of automatic secure saves for my writings. I can use flashbake instead of dropbox. But i'd like to have a clear understanding of GitHub free plans caveats, especially about privacy of the repos :)
ljegou··on Why Do Google Maps’s City Labels Seem So Readable?
An example of the contamination of bad world maps projection :

http://aworldoftweets.frogdesign.com/

ljegou··on How the iPad fired my building Watchman
I'm specially appalled by learning the fact that all magazine maps are officially rubber-stamped to inform the reader about the usage of the map !

More on this subject : http://www.indianexpress.com/news/foreign-magazine-map-is-st...

ljegou··on Ask HN: Any influential movie about Mathematics?
"A Beautiful Mind", about John Forbes Nash Jr.
ljegou··on Why Do Google Maps’s City Labels Seem So Readable?
Google Maps is not useless, far from it. The projection method chosen (Mercator) is useless for the small scales, and misleading. Except if you are a (XVII° century) marine navigator.

De-zoom and look at the apparent continent sizes, it's just horrible. Half of emerged lands in antarctica ? Groenland the size of Africa ? Think about children exposed to those maps before a good atlas is showed to them.

I co-wrote a paper about this topic, but it's in french : http://mappemonde.mgm.fr/num20/internet/int08401.html

A technical choice (summary : it's easier to have perpendicular parallels and meridians) has prevailed upon a geographical choice. It's not very complicated to link the projection to the scale of the view, all serious geographical internet portals are doing so (IGN, Ordnance Survey, etc.)

ljegou··on Why Do Google Maps’s City Labels Seem So Readable?
The micro-scale graphical design is good. It's a pity, however, that big geographical and data quality blunders are present on Google Maps.

Examples : world projection (Mercator, useless), lack of metadata (dates of the images ?), choice of labels at medium scale (especially with the 'Relief' maps).

Such discrepancy between good graphical precision, esthetics and geographical imprecision, lack of quality information are misleading a large part of the public.

ljegou··on The Only OS X Shortcut You Need to Remember
I agree, but i kept wondering about the lifespan of my apple-samsung ssd, without trim.
ljegou··on Speaking about color: hue, value, saturation, chroma, shade, tint, tone
The best (scientifically sound and recent) information about color perception i found is in Colin Ware books :

- Information Visualization : perception for design (chapter 4 about color)

- Visual Thinking (more accessible).

ljegou··on Google Maps Caught in Border Dispute
Google Maps must diffuse metadatas with their maps : date, origin/source, level of quality, scale of usability, etc.

It's the least they can do to reduce the occurence of such problems. Any honest and serious map data diffusion present metadatas. Cf. the EU "Inspire" directive for public geographical data diffusion.

ljegou··on Google Releases mod_pagespeed for Apache
It sounds a bit paranoid (and surely technically unimportant), but the first negative aspect that i think of is :

this is putting Google into our servers, too.

ljegou··on Google Chrome integrates display of PDF into browser
Thanks, it was bugged in my 8.x OSX version of Chrome (can't change page)
ljegou··on My (hastily written) Tips About Designing for the Web
Yep, especially about noise and texture.
ljegou··on It’s Morning in India
I agree, but the first part of the first sentence is very very true. As a french university employee, i can confirm :/
ljegou··on Calculate Latitude/Longitude Distances in MySQL with the Haversine Function
Beware, coordinates are not always expressed in the same referencial (geoid, ellipsoid, etc.).
ljegou··on HN: Share an unused idea
A graphic design assistance app : summary of colors and fonts used, automatic detection of design blunders, misalignments, blurred / reduced previews, masked symbols etc.
ljegou··on Styled Maps Using Google Maps API Version 3
http://xkcd.com/386/ :)
ljegou··on Styled Maps Using Google Maps API Version 3
Styling is part of design, but not a major part. Am i clear, now ?
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