Walker. Amateur shutterbug. Geographer by training and profession. Canadian living stateside. he/him
New Jersey, USA
Joined November 2008
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I did an interview at work:
blogs.ei.columbia.edu/2019/0… – at Piermont, NY
Greg Yetman retweeted
NEW DATA: We've published 2 important datasets on travel networks in DRC! The first dataset maps road and path locations, while the second helps to calculate travel times for walking and/or motorized travel on those paths and roads.
Datasets here: grid3.org/drc
Greg Yetman retweeted
🚀New research in @ijgis - innovative method converts fractional population estimates into accurate integers, preserving totals, spatial detail & demographic consistency.
🌍#GeoData #PopulationStats
🔗🔊Report and audio summary: worldpop.org/blog/new-method…
Declining response rates to censuses and surveys is an issue for official data, this article summarizes a new paper on the issue. #census #data
news.climate.columbia.edu/20…
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Greg Yetman retweeted
🚗Commuting zones represent areas where we spend most of our time based on where we live & work.
🛣️Our newest dashboard developed w/ @Meta's Data for Good explores how road coverage compares to population in commuting zones worldwide.
Explore it here 👉 bit.ly/40AIPtg
Looking forward to Geography 2050 this week!
americangeo.regfox.com/geogr…
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Empowering Development: Comprehensive Data from GRID3 Highlights Sub-Saharan Settlements and Health Infrastructure in the DRC | CIESIN Columbia University ciesin.climate.columbia.edu/…
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Greg Yetman retweeted
AmeriGEO's recent water resources workshop in Ecuador taught attendees how to work with data from #NASASEDAC and other sources to identify areas at risk of flooding. The event was noteworthy not only for what attendees learned, but how.
Learn more: go.nasa.gov/40ar3i0
ALT This image shows global annual water surplus and deficit data from SEDAC's Water Security Indicator Model - Global Land Data Assimilation System (WSIM-GLDAS) dataset. The dataset enables the analysis of numerous parameters and time scales, which workshop participants narrowed down to a single attribute within the six-year period from 2000 to 2005. Credit: NASA's SEDAC.
New job posting @ciesin, come join our IT team as a systems administrator!
opportunities.columbia.edu/j…
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New dataset release! Detailed settlement extents for 46 sub-Saharan Africa countries. Open license. #OpenData #settlements
data.grid3.org/search?catego…
Greg Yetman retweeted
@servir_wa
Great discussions today @servir_wa Annual Planning meeting on industrialization and graduation of services #ConnectingSpacetoVillage with adapted solutions & real-time information to end-users
@SERVIRGlobal
@USAIDWestAfrica
@ICRISAT
Greg Yetman retweeted
🎉 Exciting News! @AmericanGeo and the Trimble Foundation are teaming up to offer #APHG teachers from underrepresented communities scholarships to attend @geography2050! Don’t miss this chance—apply now! 🌍✨ tinyurl.com/AGS-Trimble #TeacherFellows #Geography2050
Come work @ciesin! GIS programmer position, help make new open data products, design analysis processes, and more! Apply via CU. #gisjobs #gischat
academic.careers.columbia.ed…
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New open urban data set from @ciesin / #SEDAC: Global Urban Polygons and Points Dataset (GUPPD). Surprisingly few global datasets on urban extents with names, here's a new one!
sedac.ciesin.columbia.edu/da…
Greg Yetman retweeted
DATA UPDATE: With partner @CIESIN we just published V3.1 of the national #DRC Settlement Extents dataset.
Added value:
📈Increased input sources: V3.1 uses 11
🗓️Input sources are more recent
🔓 100% Open data
👉bit.ly/4dnSdW3
Headed to @theAGU meeting this year? I'm co-organizing a session on Gridded Population Modeling Using Remotely Sensed Data for at Risk Populations, please consider submitting an abstract!
#agu2024 #population #remotesensing
agu.confex.com/agu/agu24/pre…
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Greg Yetman retweeted
‼️ We are thrilled to announce that the GIScience 2025 conference will be held at the University of Canterbury in Christchurch, New Zealand, August 26-29, 2025 🇳🇿
giscience2025.org
#giscience #gischat #giscience2025 @UCNZ
ALT "Christchurch Port Hills" photo by jamesnimmo, CC BY 2.0 DEED
CIESIN @columbiaclimate is hiring a deputy director. Great opportunity for those with skills in spatial data/science, decision support; and interests in environmental justice, population dynamics, climate, disasters, remote sensing and more. See: academic.careers.columbia.ed…
Greg Yetman retweeted
Excited to be part of @GIScience_conf. Hope to see you! @PennStateGIS @psugeography @ciesin @Tuholske @openmapping_ap @WiGIS_UG @youthmappers @UNSDSN @codata @PrinzEugn @gyetman @peter_pelias @Alex_deS @mjbiancagc @brycegc @mschneiderstats @Colleen__Neely @Researching_GW
‼️ We are thrilled to announce that the GIScience 2025 conference will be held at the University of Canterbury in Christchurch, New Zealand, August 26-29, 2025 🇳🇿
giscience2025.org
#giscience #gischat #giscience2025 @UCNZ
ALT "Christchurch Port Hills" photo by jamesnimmo, CC BY 2.0 DEED
Greg Yetman retweeted
A strong and long-lasting band of storms, called a derecho, brought tornadoes and destructive winds to Houston on May 16.
Power outages were widespread enough to be noticeable in these nighttime satellite images by the @nasa-@noaa Suomi NPP. go.nasa.gov/4bQsSDm