Showing the way with superb digital and print mapping solutions

  • Analysis

    PetersonGIS got its start in 2001, creating salmonid refugia maps for several counties in Washington State. This led to work with NOAA, creating Chinook critical habitat maps, and with the Hood Canal Coordinating Council, working on forest harvest loss quantification of LiDAR imagery and other salmon-related habitat analyses.


    Many clients and many projects later, PetersonGIS continues to be passionate about natural resources spatial analysis.



    PetersonGIS has always been interested in map data visualization techniques and avant-garde design, especially as these techniques further our customer's understanding of their data and further their message to their own customers. We've made hundreds of maps and written a few textbooks on cartography that are used in university classrooms around the world.


    Map design tools are in a constant state of flux and continual improvement by many organizations and vendors. We keep our eye on the latest developments in the spatial field to make sure your needs are met to the fullest. Tools we're loving: Mapbox, OpenLayers, QGIS, ArcMap, Inkscape, D3.js, GeoGig, CartoCSS, SLD, Imposm3, and Git for collaborative cartography.

  • Digital Mapping

    We create custom designed, interactive basemaps for the entire world at all zoom levels. We work with you on your hosting needs for these basemaps, whether they will be stand-alone or embedded within an existing site.

  • Community Involvement

    We love to be a part of the spatial community! See the instructional live-demo on how to make this map in our FOSS4GNA presentation and the accompanying written tutorial presented and tested at Boulder Maptime.

  • Where We Hang Out




    Our Videos

  • News

    We are:

    • producing high quality cartography of world-wide hillshade, aspect, and other raster data using SLD/Geoserver for our clients.
    • celebrating the our newest book City Maps: A Coloring Book for Adults, which is selling widely and wildly! It was even featured in The Atlantic's CityLab and The Guardian.
    • telling everyone about QGIS Map Design, released in March 2016 by LocatePress and co-authored by Anita Graser and Gretchen Peterson.
    • excited to see our Ye Olde Pubs of London's Square Mile map featured in the 2016 Geohipster calendar. Learn more about the calendar and order one!
    • continuing to support the Hood Canal Coordinating Council (See our NOAA CCAP map here) with a new protected lands database, AGOL maps and apps, and custom print cartography.

    We were recently:

    • revising and updating City Maps: A Coloring Book for Adults as per all the great feedback we've gotten. The newly revised edition is already available.
    • giving one of the most-viewed talks at the FOSS4GNA conference in May 2016.
    • giving a workshop and talk at the Manitoba Planning Conference in May 2016 and providing training to the Manitoba Community & Regional Planning department.
    • profiled in an Atlantic's CityLab article about the "extraordinary women making maps today."
    • creating map products for The Hood Canal Coordinating Council.
    • giving an all-day cartography workshop in Sacramento on April 20, 2016 for Norcal URISA.
    • updating our entire resources list for aspiring cartographers in January 2016. This list has been periodically updated since 2009 and we're proud of it!
    • keynoting the Manitoba GIS User Group Fall Conference on October 7, 2015. Check out the slides.
    • speaking on Cartography in the Modern World on May 22, 2015 at the Texas GeoDeveloper Roundup GeoRodeo.
    • live demoing QGIS on March 10, 2015 at the FOSS4G North America conference. You can find the talk here. It has been the 3rd most viewed talk of the conference!
    • collaborating with Bright Rain Solutions and Mangrove Services to create interactive d3 charts for an NGO. See this in action here.

  • Contact Us

    Feel free to let us know what you need!