: This site is an excellent source for high-resolution topographic data, including LiDAR, provided by OpenTopography .
: While primarily satellite-based, you can view topographic contours in Google Earth by enabling terrain layers or using specific KML overlays. Essential Apps for Offline Use Topo Map Free
: For those in New Zealand, topos.nz offers free online and offline mobile access to LINZ topographic data. Quick Guide to Reading Topo Maps : This site is an excellent source for
: A popular resource for cartographers and hikers alike, OpenTopoMap renders topographic maps based on OpenStreetMap data and SRTM elevation information. Quick Guide to Reading Topo Maps : A
: This is a premier tool for custom map making. The CalTopo website allows users to mix different layers, including updated USGS data and slope angle shading, which is vital for winter travel.
: Available on the Google Play Store , this app offers many features of a standalone GPS device for free, including grid positioning and route following.