ojs
Author
Nicolas Lambert
@neocarto
Front-end cartographer. Research Engineer in Geographic Information Science at CNRS & UAR RIATE. Author of Mad Maps (2019), Practical Handbook of Thematic Cartography (2016, 2020, 2025) and Cartographia (2025).
Comments (5)
Fati CHEN
Mar 16, 2021there is a weird at elevation 22. Also, maybe include negative elevation for oceans ?
Nicolas Lambert
Mar 16, 2021Ok thank you. It was because the first point in x was not the sea. It's corrected.
Radamés Ajna
Mar 17, 2021hi @neocartocnrs, very cool notebook! I had some fun flipping the axis! https://observablehq.com/d/c2aa797f5f7eae14. I'm not sure if it's correct ! would it make sense to offer an option to switch x for y?
Nicolas Lambert
Mar 18, 2021That's cool :-) But I suggest tu use dem2.csv instead of dem.csv (dem.csv gives the value of the max altitude per pixel while dem.csv gives the average value)
Radamés Ajna
Mar 18, 2021ohh yes, I guess I've forked you project before your mean/max update
© 2026 Observable, Inc.