Data Sourcing

is an open source mapping platform

for developers to create custom designed maps

for web or mobile apps

API & SDK

Maps

Hosting

Maps

Satellite

Streets

Terrain

Satellite

Consists imagery from various sources

Low res - NASA MODIS satellites
Med res - NASA/USGS Landsat
Hi res (0.3m-2m) - DigitalGlobe
Aerial imagery (~30 cm) - DigitalGlobe, Government, other public sources

Terrain

Consists contour & hillshades from various sources

Global 30m pixel spacing - Shuttle Radar Topography Mission-Level 2 (SRTM-2) from US Government
US & EU 5m pixel spacing - NEXTMap® from Intermap®
More detailed spacing from other open sources around the world

Streets

Consists streets and other features from OpenStreetMap

Among layers in Streets:

landuse
waterway
water
aeroway
barrier_line
building
landuse_overlay
tunnel
road
bridge
admin

country_label_line
country_label
marine_label
state_label
place_label
water_label
poi_label
road_label
waterway_label
housenum_label

*Reference

The Free Wiki World Map

OpenStreetMap (OSM) is a collaborative project to create a free editable map of the world.

Licensed under Open Database License (ODbL),
anyone can Use, Edit and Share OSM data

OSM main source of map updates are solely from contributors

They are either

Individual contributors
Communities/Organizations
Government departments

Government, communities & organizations usually able to provide large scale map imports into OSM (Import Catalog)

Contributing to OpenStreetMaps

Edit using editing tools

iD - Official OSM web browser editing tool

JOSM - Desktop application

Contributors are advised to edit the map from their own memory, GPS track or using aerial imagery

Potlatch 2 - Flash application replaced by iD

Using Mapillary

Mobile apps that allow users to upload GPS track & geotagged images

Restricted Update Sources

Google Maps, Google Satellite, Google Earth and Google Street View
Waze
HERE Maps
Geodata from Wikipedia
Wikimapia
Malfreemaps/Malsingmaps

However user are allowed to use the sources to validate their memories

Microsoft has given specific permission for OSM users to use their data

Vandalism Control

Changeset focused
Changeset focused detection relies on scanning changesets for nefarious behavior by examining the metadata of the changeset and perhaps the actual objects or nature of tags used. One common method employs limits on the amount of objects edited, added, or deleted.

User focused
User focused detection looks at the editing character of the individual. Did a user make 300 edits within 10 minutes of joining? Are all edits of a new user deletions? This detection aims to catch the behavior of the individual instead of the characteristics of the objects.

Mapbox Data Sourcing

By hizumi