#geojson

The purpose of this project is to programmatically extract maps from open databases like #OpenStreetMap providing you with a ready to use #GeoJSON #map that fits your needs.

https://raw.githubusercontent.com/simonepri/geo-maps/master/media/geo-maps.jpg

▻https://github.com/simonepri/geo-maps

d3.geo2rect

Morphing #geojson #polygons into #rectangles

https://raw.githubusercontent.com/sebastian-meier/d3.geo2rect/master/thumb.gif

▻https://github.com/sebastian-meier/d3.geo2rect

#d3js

api.gouv.fr
▻https://api.gouv.fr

Vous êtes une #administration, une collectivité, un éditeur de solutions pour les particuliers ou les entreprises et souhaitez simplifier radicalement la relation des usagers à l’administration.
Les #API présentées ici sont des interfaces web permettant la communication et l’échange de #données entre applications.
Les API proposées vous permettent de :
simplifier les démarches d’un usager
guider l’usager dans la saisie d’informations
récupérer des informations que l’administration possède déjà

Voir par ex la base d’#adresses nationales : ▻https://api.gouv.fr/api/base-adresse-nationale.html
#gouvernement #big_data #web_dev

#vector #tiles - YouTube

In Part 1 I’ll talk about vector tiles, both serving and consuming them. Part 2 will discuss creating and styling vector tiles with your own data.

▻https://www.youtube.com/watch?v=xI7QkEodCac

▻https://www.youtube.com/watch?v=GPArNrRL79Q

#map

GitHub - mapbox/geojsonhint: validate #geojson objects against the specification
▻https://github.com/mapbox/geojsonhint

A lint tool for the GeoJSON standard. geojsonhint is written to the standard, with no missing or additional opinions about structure.

#validation

Thenmap is a repository for historical borders..

▻http://www.thenmap.net

#geojson #histoire #frontières #cartographie
à noter on peut aussi télécharger en #topojson mais, du peu que j’ai regardé, c’est pas du « vrai » topojson : les limites des pays ne sont pas toujours parfaitement superposées

dates disponibles : de 1945 à nos jours

par journalism++

geojson.xyz: A simple, open source website, CDN, and CLI utility for the fast access of #GeoJSON data for web mapping examples and experiments.

▻http://geojson.xyz

#natural_earth made easy

▻http://www.macwright.org/2015/12/13/geojson-xyz.html
▻https://www.youtube.com/watch?v=3iyGdlHDZLc

Peter Selinger : Potrace
▻http://potrace.sourceforge.net

Potrace is a tool for tracing a #bitmap, which means, transforming a bitmap into a smooth, scalable image. The input is a bitmap (PBM, PGM, PPM, or BMP format), and the default output is an encapsulated PostScript file (EPS). A typical use is to create EPS files from scanned data, such as company or university logos, handwritten notes, etc. The resulting image is not “jaggy” like a bitmap, but smooth. It can then be rendered at any resolution. Potrace can currently produce the following output formats: EPS, PostScript, PDF, #svg (scalable #vector graphics), DXF, #geojson, PGM (for easy antialiasing of pixel-based #images), Gimppath, and XFig. Additional backends might be added in the future.

via ▻http://blog.thematicmapping.org/2015/12/mapping-real-time-snow-cover.html

#shell

mapbox/polyline · GitHub
▻https://github.com/mapbox/polyline

A simple google-esque polyline implementation in #javascript. Compatible with nodejs (npm install polyline and the browser (copy src/polyline.js)). Encodes/decodes into lat/lng coordinate pairs. Use fromGeoJSON() to encode from #geojson objects.

#map #polylines

tmcw/awesome-geojson
▻https://github.com/tmcw/awesome-geojson

GeoJSON utilities that will make your life easier.

d’habitude je fuis ce genre de compilation, mais cette fois je veux bien faire une exception :)

#map #geojson

#GeoJSON #Hexagonal “Statebins” in R | rud.is
▻http://rud.is/b/2015/05/14/geojson-hexagonal-statebins-in-r

https://rud.is/b/wp-content/uploads/2015/05/Rplot03.png

le #shapefile qui va bien (je sais pas si un jour on aura besoin d’un truc comme ça pour l’UE ?)

#cartographie

#Geotype is a cli tool for rendering #GeoJSON from the command line.

▻http://morganherlocker.com/post/geotype

http://morganherlocker.com/img/geotype1.gif

mapbox/geobuf · GitHub
▻https://github.com/mapbox/geobuf

Geobuf is a compact binary encoding for geographic data. #geobuf provides lossless compression of #geojson and #topojson data into protocol buffers. Advantages over using JSON-based formats alone: - Very compact: typically makes GeoJSON 6-8 times smaller and TopoJSON 2-3 times smaller. - Smaller even when comparing gzipped sizes: 2-2.5x compression for GeoJSON and 20-30% for TopoJSON. - Very fast encoding and decoding — even faster than native JSON parse/stringify. - Can accommodate any GeoJSON and TopoJSON data, including extensions with arbitrary properties. The encoding format also potentially allows: - Easy incremental parsing — get features out as you read them, without the need to build in-memory representation of the whole data. - Partial reads — read only the parts you actually (...)

#map

Sketch #map - OSM + D3 + Walkway.js = animated drawn map
▻http://sketchcart.herokuapp.com

un démo de carte qui « dessine » du #geojson au chargement sources dispos par ici : ▻https://github.com/mapmeld/sketchcart

#d3.js

kekscom/L.Line3
▻https://github.com/kekscom/L.Line3

L.Line3 is #leaflet map layer for drawing #3d vector lines.

Example ▻http://keks.com/dev/line3

Tous les pays du monde en #JSON, #CSV et #XML.

▻https://mledoze.github.io/countries

installable via #composer (#PHP)

avec des données géographique en #svg :
▻https://github.com/mledoze/countries/tree/master/data

En licence ODL

via @codepo8

exploitée ici par exemple : ▻http://restcountries.eu

GIS without GIS Servers
▻http://www.spatiallyadjusted.com/2014/09/08/gis-without-gis-servers

My bandmate, Sheldon McGee, and I presented at AGIC 2014 on how to serve up vector data in Google Maps without using some crazy GIS Server type software. Just a little node.js and some #PostGIS is all one needs.

▻http://tooshel.github.io/agic2014/#

▻https://github.com/tooshel/node-gis-server

#mapserver #nodejs #geojson

gistmap
▻https://github.com/mgax/gistmap/wiki
GistMap is a service for publishing maps, with no backend infrastructure, just static files and public services. It works by downloading a configuration file from Gist, then fetching #geojson/#topojson from any CORS-enabled URL, and tabular #data files from Google Spreadsheet, then rendering them in the browser. Here are some examples
#cartographie via @francoisbriatte

stamen/merge-geojson-features
▻https://github.com/stamen/merge-geojson-features

Merges #geojson Features and FeatureCollections.

#map #nodejs

stamen/elevate
▻https://github.com/stamen/elevate

Enrich #geojson features using the MapQuest Open #elevation API.

#map #nodejs

#Github et les révisions de fichiers géographiques c’est juste fabuleux

https://dl.dropbox.com/s/6bvz1s9obqcuk9e/fix%20western%20sahara%20ESH.png https://dl.dropbox.com/s/x0zklnw4pzzry6j/fix%20western%20sahara%20MAR.png

Là par exemple, je viens de corriger la frontière #Maroc - #Sahara_occidental ; #Natural_Earth, la source de fonds de cartes utilisée par la plupart des gens, n’a pas l’air de savoir que les Nations unies ont placé cette frontière à la latitude 27°40’N, et place la limite sur le tracé du « mur ».

Les fichiers sont au format #geojson, et pour les modifier je suis passé par ►http://geojson.io

▻https://github.com/johan/world.geo.json/pull/21

#GitHub adds visual history for maps | Mapbox
▻https://www.mapbox.com/blog/github-visual-diff

https://i.imgur.com/4lWFvVH.gif

#GeoJSON #cartographie #git

#leaflet-omnivore by @mapbox
▻https://github.com/mapbox/leaflet-omnivore

#Leaflet supports the #GeoJSON format by default. What if you have something else? That’s where omnivore comes in.

var map = L.mapbox.map('map', 'examples.map-9ijuk24y')
   .setView([38, -102.0], 5);

omnivore.csv('a.csv').addTo(map);
omnivore.gpx('a.gpx').addTo(map);
omnivore.kml('a.kml').addTo(map);
omnivore.wkt('a.wkt').addTo(map);
omnivore.geojson('a.geojson').addTo(map);

#mapshaper
▻https://github.com/mbloch/mapshaper

Mapshaper is a program for editing polygon and polyline datasets for mapping. The command line interface has commands for line simplification, polygon aggregation, attribute field calculation, filtering, splitting, table joins and more. The web-based gui focuses on interactive simplification.

Mapshaper can read and write #Shapefile, #GeoJSON and #TopoJSON files.

(...) examples:

Extract the border between two states. mapshaper --filter "STATE=='OR' || STATE=='WA'" --innerlines states.shp

Generate two new fields using JavaScript. mapshaper --expression "STATE_FIPS=CNTY_FIPS.substr(0, 5), AREA=$.area" counties.shp

Zoomed-in view of Norwegian coastline at 5% simplification

https://github-camo.global.ssl.fastly.net/9c10ce9ac9aba29e506a44fbff329502164cf073/687474703a2f2f6d61707368617065722e6f72672f696d616765732f73696d706c696669636174696f6e2d64657461696c2e706e67#.png

#GIS via @nicolaslambert

Deux applications pour concevoir des #cartes personnalisées en ligne :

– uMap, par Yohan Boniface. Le site est hébergé par openstreetmap.fr, serveur de l’association française OSM : ►http://umap.openstreetmap.fr/fr

uMap lets you create maps with OpenStreetMap layers in a minute and embed them in your site. Because we think that the more OSM will be used, the more OSM will be ’’cured’’. It uses django-leaflet-storage and Leaflet.Storage, built on top of Django and Leaflet.

Le projet sur Bitbucket : ▻https://bitbucket.org/yohanboniface/umap

– geojson.io, par Mapbox. Permet d’éditer en direct et avec interface graphique un fichier geojson : ►http://geojson.io

Présentation du projet :
►https://www.mapbox.com/blog/geojsonio-announce

We are trying to make it easier to draw, change, and publish maps. Some of the most important geospatial data is the information we know, observe, and can draw on a napkin. This is the kind of data that we also like to collaborate on, like collecting bars that have free wifi ✎ or favorite running routes.
geojson.io aims to fix that. It’s an an open source project built with MapBox.js, GitHub’s powerful new Gist and GeoJSON features, and an array of microlibraries that power import, export, editing, and lots more.

Github : ▻https://github.com/mapbox/geojson.io

#map #webmapping #geojson #openstreetmap