Posts in GIS

Introducing MORAclim: State-of-the-art Climate Maps for Mt. Rainier National Park

With support from the Northwest Climate Science Center, USGS Center for Integrated Data and Analytics, and the National Park Service, it’s my pleasure to introduce new gridded climate maps for Mt. Rainier National Park. These products are based on six years of monitoring air temperature and snow duration at hundreds of sites across Mt. Rainier using data from climate stations and low-cost distributed temperature sensors.

written in Climate, GIS, maps Read on →

Snow Melt Forecasts for Mt. Rainier National Park

I'm spending some time at Mt. Rainier National Park this spring as a "Scientist in Residence", a position made possible by support from the Northwest Climate Science Center. One of the projects that I'm working on is generating up-to-date forecasts of when Mt. Rainier's (massive) snowpack will finally melt this summer. The timing of snow melt is important for wildflower phenology (one of my research interests), but it's also important because it determines when some of the park's management activities can happen (i.e. trail maintenance, road openings), and potentially for visitors. This post serves as a brief FAQ to the forecasts, which are available live today.

The link to the most up-to-date forecast map is here.

written in GIS, MapBox, R, maps Read on →

Easy Web Maps With R and Leaflet

I've been using R as a Geographic Information System (GIS) for a long time, and I've relied heavily on the excellent rgdal, maptools, and raster packages to process spatial data. One thing has always bugged me about this workflow, however. If I want to check or explore geographic data by clicking around on a map, I nearly always have to export it and open it up in another program like ArcGIS or QGIS. That's why I was really excited to learn that the folks at Rstudio have come up with a cool solution: they've written R wrappers for the leaflet javascript library which allows folks to quickly overlay vector data on an interactive web map.

In this post I'll describe how to build this map and share it on Rpubs or a self-hosted website. This assumes you have some familiarity with R and manipulating spatial data. For a great compendium of resources on GIS in R, see here

written in GIS, R, leaflet, maps Read on →