Nav Icon

Back Arrow Postholer.Com
Resource for Hikers

Login/Register
Log in or register for full access to site features & free downloads

COVID-19 Status & Maps
Daily status of the COVID-19 pandemic and its relationship to the trails.

Printed Maps & App
Stay found. Stay informead. Our premium printed topographic maps and matching app for a once in a lifetime adventure

OnLine Data Books
Free online data books for your favorite trail, distances, elevation, climate, way points, terrain & fauna

Google Maps
GPS aware Google maps, your location, topo, hybrid, satellite, trail track, way points, road, weather/snow overlays

Active Fires & Smoke
Know before you go! Get the lastest active fire & smoke information for your favorite trail

Snow Conditions
Get the lastest snow conditions for your favorite trail. Quantity, coverage, SNODAS, MODIS, historical and multi-year comparisons

Trip Planners
Create an extensive hike plan easily configurable to your hiking style. Distances, days, resupply, access points, etc

Gear Builder
Create your own fully customizable gear list with weight, pricing and divisable by section.

Trail Animals
Exhaustive resource for species ranges along your favorite trail. Includes amphibians, birds, mammals and reptiles.

Complete Gear Lists
Hundreds of complete gear lists by those that walked the walk.

Elevations Profiles
The big picture. Single elevation profile of your favorite trail.

Journal Tools
Search for a journal, create a journal, add/edit an entry, configure your journal, EMail updates, integrated Google trail map, PLB locations and more

Wall Maps
Print out your favorite trail to 6 feet high. Elevation chart and resupply locations.

Postholer Forum
Source for trail and site information or just talk about your favorite trail

Project GIS

Project GIS is an extensive resource for hiking enthusiasts providing single source, trail relevant data in a variety of formats.

The idea behind Project GIS is to gather trail relevant information, either created locally or from existing remote sources, and make it available in various formats. Transparently, multiple data sources can be combined, as defined by the end user, in a format such as PNG, JPG, GIF, GeoTIFF, KML, etc or a tiled variant for interactive maps. For non-image data it can also be obtained as text, CSV, JSON or other desired formats. Read the Project GIS documentation.

However, Project GIS is much more than an idea. Over the last few months we have been diligently creating the foundation. It begins with powerhouse processing running Linux in the cloud. On this is a PostgreSQL database with the PostGIS extension, all served up by GeoServer. We use a variety of other tools extensively such as GDAL for database pre-processing. This is a subset of the software we use to create our printed maps. All software is open source.

Become a Patron

Tell us what you want. We have many ideas. We are working hard to meet our next set of goals. You may want the same feature as us, this bumps up the priority. Patrons receive preference. Submit suggestions or feature requests in the Project GIS forum.

National SNODAS/MODIS Trail Map Example

Mar 25, 2020 National Snow Map with major hiking trails. 6 different local/remote data sources: SNODAS, MODIS, states outline, trail alignments, resupply locations and NLCD land cover overlay. 2 different types of source data: raster and vector. Output is a single PNG image.

Project GIS Documentation/Examples

Project GIS documentation has information and examples on how to get the data you need. For instance, creating the above map is just a single, well defined link (URI is the fancy name). It can be used in the source of an html img tag, retrieved as a .png file using wget/curl or displayed right in your browser. It looks like this:

   http://gis.postholer.com/services/reflect?
      layers=nlcd,snowcover8dayLatest,sweLatest,stateLines,trace,wptByTrailType
      &ids=1,2,3,4,9,18,20,25,27,34
      &trail_id=2
      &types=1
      &startmile=0
      &endmile=5000
      &height=500
      &t_srs=EPSG:900913
      &bbox=-126,24,-66,50

Postholer.Com © 2005-2020 - Sitemap - W3C