2018 (old posts, page 4)

Montgomery Pass

On my way home from Gould yesterday morning, I pulled off of CO-14 at the Zimmerman Lake parking lot, changed into running gear, and trotted west up to the Medicine Bow Range's Montgomery Pass. I hit the trail just after 7:00 a.m.


Montgomery Pass trail below treeline.

I've been up this trail 20 times or more, but mostly in the snow, and very rarely in the last decade. I can't remember ever going up alone or trying to run it. I made it to the Montgomery Pass signpost in just under 35 minutes. I ran some stretches, but mostly hiked it. The trail grade averages just over 10%.


Looking south to the Diamond Peaks, Nokhu Crags, and Rocky Mountain National Park.

On the ridge at the south end of the Medicine Bow Range it is easy cruising. The third high point (3524 meters or 11,560 feet above sea level) north of Montgomery Pass has a solar-powered antenna installation and nice views of North Park, the higher Medicine Bow peaks, the Mummy Range, and the Never Summer Range.


Pseudo-black-and-white photo from the radio tower.

Near the end of my run, I started to see hikers heading up the trail. One of them was a backcountry skiing buddy from twenty years ago who I rarely bump into in Fort Collins. On the drive home, I thought a lot about how much I've changed in that time, and how these mountains remaining so compelling to many of us.

I was back at my car in an hour and 45 minutes, not a long excursion at all, but felt energized from it all day long today. I really need to find the time to get on some more summits again this summer.

Shapely 1.7a1

The first pre-release for Shapely 1.7 is up on PyPI now. I'd be grateful if you would pip install shapely==1.7a1 and try it out. Since 1.6 there have been a few significant changes. Still no Windows wheels, but we're working on it.

Never Summer 100k Volunteering

In an hour I'm going to drive on CO-14 to the west side of Cameron Pass to help out with the Never Summer 100k race. My assignment is to be at the finish line and make sure finishers get a hot meal all night long. I haven't spent a night out in the mountains yet this summer and I'm looking forward to it. More about this after I get back tomorrow.

Rasterio 1.0.0

From Rasterio's new discussion group/email list, here's the 1.0.0 announcement.

Hi, all.

We, the authors of Rasterio, are pleased to announce the release of Rasterio 1.0.0.

What is the significance of 1.0.0? Stability. After more than a year of changes, there is at last a stable base for applications. You can pin rasterio ~= 1.0 in your project’s requirements and enjoy nothing but bug fixes for as long as the project supplies them.


Many new features have been added since the last stable release (0.36). Especially notable are the following.

  • All new documentation at https://rasterio.readthedocs.io/en/stable/.
  • Binary wheels with GDAL 2.x included for the macOS and manylinux1 platforms are available on pypi.org.
  • A new Window class with floating point origin and offsets has been added to help with windowed dataset operations.
  • BytesIO-like MemoryFile and ZipMemoryFile classes that support access to in-memory datasets.
  • A WarpedVRT class exposes GDAL’s warp-on-demand VRT features.
  • Support for georeferencing by ground control points has been added.
  • The rasterio.shutil module provides many of the same features as Python’s shutil, but also knows about sidecar files (masks, overviews, metadata).

Upgrading and compatibility

Rasterio is compatible with GDAL versions 1.11-2.3 and Python versions 2.7, and 3.4-3.7.

We have deprecated a number of features since 0.36. Features have been removed, after some warning, at 1.0a1, 1.0a10, 1.0b1, and 1.0rc2. We recommend migrating stepwise through those tags to get from 0.36 to 1.0.0 if you're feeling extra cautious.


The primary channel for installation and usage support is the Rasterio user discussion group at https://rasterio.groups.io/g/main. Please see https://github.com/mapbox/rasterio/blob/master/CONTRIBUTING.rst for guidance on reporting bugs or proposing new features.


Rasterio 1.0.0 is the work of 68 authors. The individuals are listed in https://github.com/mapbox/rasterio/blob/master/AUTHORS.txt.

This number does not include people who have created and commented on issues in the project’s issue tracker, but their contributions are also very important. We’ve received some of the best bug reports ever written.

Rasterio benefits from a userbase in many different areas of work and study. Advocates across companies, classrooms, and projects have helped make Rasterio what it is. We particularly thank people who help distribute it, and people who help teach others to use it. Among those are: Christoph Gohlke, the conda-forge and Debian GIS teams, Howard Butler, Sara Safavi, Dana Bauer, Leah Wasser, Chris Holdgraf, and everyone else who has taught Rasterio in a workshop or course, or presented Rasterio to a conference or meetup audience.

Rasterio has benefited from helpful folks on the GIS StackExchange. Luke Pinner, Loïc Dutrieux, Martin Laloux, and Kersten Clauss are foremost among them.

Everything we know about building and distributing binary wheels comes from the SciPy community. Thank you, Matthew Brett, Nathaniel Smith, et al., for writing the delocate and auditwheel tools and supporting them.

Even Rouault, GDAL’s maintainer, has been our patient guru and guide during many difficult passages.

Early adoption by engineering teams in the satellite imagery business has also been key to Rasterio’s success. The project is indebted to developers who tried it and managers who supported them.

Thank you all!

July 3, 2017: Refuge Alfred Wills and Col d'Anterne

On my family's hut-to-hut trip in the Alpes a year ago we went from soggy and cold condtions – here are my kids drinking tea and eating blackberry tarts at the Refuge Alfred Wills to deal with the inclement weather on July 2 –


to bright, sunny, and warm conditions on July 3.


We even got peeks at Mont Blanc through the clouds from the Col d'Anterne.


So much fun. We'll remember this trip forever.

June 27, 2017: Arabelle's 6ème graduation

A year ago my oldest kid finished 6th grade at Collège Jeu de Mail in Montpellier, France and I went to the pâtisserie Palais Saint Lazare for a dark chocolate and white chocolate and red fruit cake to celebrate the occasion. It's a great bakery that I discovered almost too late in our séjour and I remember the cake being perfectly delicious.

Graduation from 6ème!

A post shared by Sean Gillies (@sean.gillies) on

In the U.S. kids are assigned to school classes based on how their birth date compares to the start of the school year. In August of 2016 my daughter would have entered 5th grade in the U.S. because her 11th birthday falls before the end of the school year, and she would have been one of the oldest kids in her class. In France, however, kids born in 2005 were entering 6th grade and she would be one of the youngest kids in her class. In a scrappy school serving less-privileged Montpellerians, with no other Anglophone kids around.

From 4th grade straight to 6th, in a city she barely remembered, and in a second language. It was a huge challenge and she rocked it. Her courage inspires me all the time.

Rasterio 1.0 Release Candidate Number One

The first 1.0 release candidate is on PyPI now: https://pypi.org/project/rasterio/1.0rc1/. I've scheduled another for Friday, which will remove a deprecated module and deprecated methods of dataset classes. I feel great about reaching this goal. I hope you'll give the release candidate a try!

We will not be having an extended release candidate phase. A final 1.0 release could come as soon as next week. Until then, I expect to be mostly busy with documentation, blog post and announcement drafting, and project wrap-up.

Rasterio 1.0b4

Vincent Sarago and I tracked down and knocked out a number of tricky warping and VRT bugs last week and I made three beta releases of Rasterio. Rasterio 1.0b4 went to the Python Package Index yesterday: https://pypi.org/project/rasterio/1.0b4/. Huge thanks to all of you who are trying these beta releases out.

Releasing Rasterio 1.0 by June 31 was one of my goals for the second quarter of 2018. I'm feeling confident about making a first release candidate at least!