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#spatiotemporal

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💧🌏 Greg Cocks

The Concept Of Indigenous GIS
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Reading a paper (alturl.com/8wte5), they used the specific term ‘Indigenous GIS’ – and I found this intriguing!
As I read it, spatial data collection and analysis was done with a focus on how a tribe or social group might ‘see’ the data, including spatiotemporal....
I look forward to finding out more about what others are working on! – so PLEASE feel free to share any examples that you might have…
#GIS #spatial #mapping #indigenous #IndigineousGIS #FirstNation #perspective #cultural #social #naturalresources #archaeology #publicsafety #socialservices #planning #design #spatialanalysis #spatiotemporal #mapping #cartography #usecase #practical #pragamatic #resultsdriven #focused##

photo - indigeneous favela resident, Brasil
historic photo - Navajo woman carrying peaches, 1902
photo - example of a portion of Maori whanau, New Zealand
map - view sheds for deathscapes, Southern Je, Brazil
Public
💧🌏 Greg Cocks

A Methodology For The Multitemporal Analysis Of Land Cover Changes And Urban Expansion Using Synthetic Aperture Radar (SAR) Imagery - A Case Study Of The Aburrá Valley In Colombia
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doi.org/10.3390/rs17030554 <-- shared paper
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#GIS #spatial #mapping #SyntheticApertureRadar #SAR #remotesensing #multitemporalanalysis #landcover #landcoverchange #clustering #kurtosis #fuzzylogic #kernelbasedmethod #machinelearning #spatialanalysis #spatiotemporal #geostatistics #model #modeling #AburráValley #Columbia #urban #urbanexpansion #population #growth #topography #monitoring #satellite #sentinel #valley #landuse #distribution #infrastructure #building #roads #naturalresources #environmental #conservation #monitoring #multitemporal

photo - looking down into Medellin, Aburrá Valley, Columbia from a surrounding high ground
annotated maps with imagery - Areas of analysis of the results by the SMA1 methodological route and kurtosis. (A). Central Park in Bello (B). Parques del Río Medellín (C). Arkadia Shopping center; (D). Peldar Plant (E). La García water supply reservoir (F). Conasfaltos dam (G). La Ayurá stream basin in Envigado (H). Central Park in Bello (I). Avenida Regional Norte (J). Vía Distribuidora Sur.
schematic / work flow - proposed methodology for analysis of zonal land cover changes
annonated maps - The Aburrá Valley (white line) between the valleys of the Magdalena and Cauca rivers. Data were acquired from ALOS PALSAR Terrain Corrected and data from IGAC.
Public
💧🌏 Greg Cocks

Earth's Oceans Are Filled With What Scientists Are Calling ‘Dark Vessels’ | Satellite Mapping Reveals Extensive Industrial Activity At Sea
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earth.com/news/dark-vessels-mo <-- shared technical article
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doi.org/10.1038/s41586-023-068 <-- shared paper
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dialogo-americas.com/articles/ <-- shared opinion piece
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#GIS #spatial #mapping #remotesensing #satellite #illegalfishing #tracking #AI #statesponsored #deeplearning #darkvessels #GPS #transmitters #AIS #turnedoff #maritime #marine #vessels #foodsecurity #sustainability #global #globalsecurity #transponders #smuggling #illegal #commercialfishing #transport #energy #oil #gas #shipping #resources #Sentential #Sentential1 #spatialanalysis #spatiotemporal #realtime #model #modeling #neuralnetwork #accuracy #radar #SAR #cargoship #infrastructure #ocean #worldwide #humanrights #MPAs #coast #coastal #EEZs #tankers #industrial #sea #windfarms

photo - Chinese fishing boats leaving port en masse
maps and charts - The growing footprint of offshore development extends far beyond the fixed infrastructure
maps & charts - About 75% of global industrial fishing and 25% of other vessel activity is not publicly tracked
maps - High-resolution mapping reveals detailed patterns of fishing activity not publicly tracked
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💧🌏 Greg Cocks

Edge Of Mars’ Great Dichotomy Eroded Back By Hundreds Of Kilometres
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arstechnica.com/science/2025/0 <-- shared technical article
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dx.doi.org/10.1038/s41561-024- <-- shared paper
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#GIS #spatial #mapping #planet #Mars #remotesensing #imagery #landsurface #geology #topography #astrogeology #elevation #morphology #martian #geography #marsdichotomy #plateau #lowlands #model #3dmodel #basin #highlands #shoreline #ocean #crust #structuralgeology #chemostratigraphy #morphostratigraphy #geomorphometry #geomorphology #water #hydrology #CaSSIS #HiRISE #stratigraphy #strata #MOLA #laser #LiDAR #MawrthVallis #crater #mound #profile #crosssection #geochemistry #mineralogy #CRISM #CTX #HRSC #DTM #erosion #weathering #spatialanalysis #spatiotemporal

images - Morphological similarities between the stratigraphy in the mounds and the Mawrth Vallis plateau region
3D model, map, images and charts - Chemostratigraphy and morphostratigraphy of a well-exposed mound
3D map and cross section - Three-dimensional view of study area with stacked elevation profiles
image/map - the topography of Mars by the Mars Orbital Laser Altimeter (MOLA)
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💧🌏 Greg Cocks

Can These Rocks Reduce Flooding? [USGS video]
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youtu.be/RWoSGOfxOQA?si=bsOLDo <-- shared video
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“Creating a binational sponge city in the desert: Flooding in the binational cities at Ambos Nogales on the Arizona-Sonora portion of the US-Mexico border has caused damage, ruined livelihoods and taken lives for hundreds of years. New research suggests that flooding can be detained using low-tech, nature-based solutions, like natural infrastructure in dryland streams (NIDS), rock detention structures and green infrastructure.…”
#GIS #spatial #mapping #geology #risk #hazard #water #hydrology #flood #flooding #mitigation #engineering #control #engineeringgeology #planning #management #rock #AmbosNogales #Arizona #USA #USWest #Sonora #Mexico #drylandstreams #natural #floodrisk #stormwater #runoff #economics #cost #floodplains #publicsafety #community #communities #spatialanalysis #spatiotemporal #model #modeling #watershed #pollution #greenspace
@USGS

screen shot - video - flooding
Public
💧🌏 Greg Cocks

The Great Dismal Swamp Has Released Millions Of Tons Of Carbon Since The Colonial Era, Research Finds
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whro.org/environment/2024-11-0 <-- shared article
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doi.org/10.1029/2024JG008137 <-- shared paper
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#GIS #spatial #mapping #climatechange #GreatDismalSwamp #carbon #NorthCarolina #Virginia #USA #engineering #water #hydrology #swamp #habitat #biodiversity #humanimpacts #carbondioxide #landuse #change #wetlands #peatlands #carbonsink #methane #model #spatialanalysis #spatiotemporal #research #peat #peatswamp #drainage #ditches #engineering #reclamation #peatfire #mitigation #ecosystem #carbonloss #hydrospatial

photo - A researcher moves through the Great Dismal Swamp in Virginia.
Schematic - ash mass concept. For a column of peat exposed to drainage, the surface peat is exposed to more oxidation and therefore carbon is lost but the ash content is conserved. This demonstrates how carbon loss can be calculated using the remaining ash in the peat column. The terms correspond to the terms in Equations 1-5, with r = reference layer and i = impacted layer. The dashed line in the second column indicates the loss. The loss in thickness due to shallow subsidence results from the difference in the bulk densities, whereas the secondary subsidence results from the loss in elevation due to oxidation, driven by the differences in ash mass.
Maps - coring locations, ditches by age, dominant vegetation communities. Contours correspond to estimated peat depths based on Oaks and Whitehead (1979). Coring locations are indicated by the following numbers: 1. GDS519, 2. GDS520, 3. GDSW1, 4. GDS77, 5. GDS83, 6. GDS528, 7. Interior-South, 8. Interior-North, 9. GDS96, 10. GDS-P + H, 11. GDS542, 12. GDS-04-14-2022-1A, 13. GDS-04-14-2022-1B. (a) Map of Great Dismal Swamp National Wildlife Refuge (GDS NWR) showing coring locations and binned ages of ditch, canal, and railroad installation, (b) Map of GDS NWR showing dominant vegetation communities within GDS NWR. The “early successional” (marsh) area to the southeast of Lake Drummond corresponds to the area burned in both 2008 and 2011. The area bounded by shading represents the Great Dismal Swamp NWR boundary.
charts - Carbon stocks and accumulation at GDS sites. (a) Carbon stocks for all sites, including two calculations for heavily impacted sites (GDS-W1, GDS-77, and GDS-P&H). Stars indicate calculations from ash mass from the lower depths of each of those cores, while the other (b) calculation for these sites indicates the lower ash mass calculation using the average of other less disturbed sites. Burn scar cores calculations are down to the first charcoal peak (a) and down to the second peak (b) for GDS-Interior-North and South. (b) Carbon accumulation and loss rates for cores with vegetation reconstructions. Negative values indicate carbon loss values.
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💧🌏 Greg Cocks

Peaches Spread Across North America Through Indigenous Networks, Radiocarbon Dating And Document Analysis Show
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phys.org/news/2024-11-peaches- <-- shared technical article
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doi.org/10.1038/s41467-024-525 <-- shared paper
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timesfreepress.com/news/2024/n <-- shared media article
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#GIS #spatial #mapping #FirstNation #cultivation #spatialanalysis #spatiotemporal #indigenous #forest #farming #sustenance #foodsecurity #traditional #deliberate #garden #ethnobiology #archaeology #anthropology #biology #forestgarden #transplanting #management #wildplant #biogeography #culture #ethnohistory #peach #peaches #fruit #tree #orchard #introduced #Spanish #indigenised #dates #dating #radiocarbondating #pits #peachpits #chronology #chronological #model #modeling #landmanagement #landuse #practices #socioecology #colonialisation #NorthAmerica #USA

photo - Jim Markley, the owner of CJ Orchards Farm in Rutledge, holds a single fortunate Muscogee 'saved' peach that managed to endure the initial warm temperatures of the year in 2023.
photo - 1902 - Navajo woman carrying peaches in a wickerwork burden basket
graphic - Bayesian chronological model
maps - spatial distribution of AMS, archeological, and ethnohistoric data.
Public
💧🌏 Greg Cocks

Indigenous Tribes Engineered British Columbia’s Modern Hazelnut Forests More Than 7,000 Years Ago
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science.org/content/article/in <-- shared technical article
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doi.org/10.1073/pnas.240230412 <-- shared paper
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[not my usual ‘sort of thing’ to post - as broad as that is - but I found this fascinating; it reminds me, in a sense, of the Incas incrementally selecting corn stock that can handle higher and higher altitudes, in ‘research stations’, although those were a domesticated crop]
#GIS #spatial #mapping #hazelnut #nut #Canada #BritishColumbia #FirstNation #cultivation #spatialanalysis #spatiotemporal #indigenous #forest #farming #sustenance #foodsecurity #traditional #wildfire #prescribedburn #landrights #law #deliberate #garden #ethnobiology #archaeology #linguistics #name #connections #anthropology #biology #forestgarden #transplanting #management #wildplant #biogeography #culture

map - Six genetically distinct clusters of hazelnuts are represented in the study region, with four groups in the “isolated” northern region. Considering ethnographic and archaeological records of hazelnut management among Ts’msyen, Nisga’a, Gitanyow, and Gitxsan, this genetic diversity very likely reflects ancient management and cultivation efforts.
charts - Clustering results of hazelnut individuals obtained by discriminant analysis of principal components (DAPC) and Bayesian-based structure analysis. (A) Plot of the first two axes from a principal component analysis (PCA) of 219 hazelnut samples genotyped for 9,650 SNPs showing differentiation between South Coast, Interior, and North samples. Groups are shown as different colors and inertia ellipses (95% of variance), while dots represent individuals. (B) Structure plot showing the posterior probabilities of assignment of individuals to the different clustering groups.
photo - hazelnut seed in tree, British Columbia, Canada
photo - First Nation member in a hazelnut kitchen, British Columbia, Canada
Public
💧🌏 Greg Cocks

NASA Satellites Reveal Abrupt Drop In Global Freshwater Levels | An Abrupt Decline in Global Terrestrial Water Storage and Its Relationship with Sea Level Change
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phys.org/news/2024-11-nasa-sat <-- shared technical article
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doi.org/10.1007/s10712-024-098 <-- shared paper
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unesco.org/reports/wwdr/en/202 <-- shared UN report on water stress
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#GIS #spatial #mapping #remotesensing #satellite #NASA #GRACE #ERA5 #water #waterresources #climatechange #sealevel #sealevelrise #SLR #waterresources #global #freshwater #watermanagement #arid #terrestrial #mascons #TWS #terrestialwaterstorage #surfacewater #groundwater #aquifers #spatialanalysis #model #modeling #spatiotemporal #drought #wateruse #watersecurity #agriculture #irrigation #hydrology #publichealth #risk #hazard #naturalresources #waterquality #gravity

a Time series of near-global (60° S–70° N) mean SST anomalies, Niño 3.4 (black), the Pacific Decadal Oscillation (PDO) index with 1-year smoothing (blue), and a North Atlantic tripole index (brown). Negative PDO corresponds to anomalous positive SSTs in the central N. Pacific. b Near-global ERA5 SST trend, 1980–2022, °C/yr. c Correlation between the Niño 3.4 index and GRACE/FO d(TWS)/dt, the latter lagged 2 months with 4-month smoothing applied. d Correlation between the PDO index and GRACE/FO TWS, 3-month smoothing applied
Map of mascons in which the GRACE/FO era minimum terrestrial water storage occurred after the start of 2015, color coded for the year of that minimum. The time series plotted in Fig. 2 is averaged over the South American region delineated in red
Comparison of ERA5-Land, GRACE/FO, and complementary observations: a deseasonalized time series of global land average (60S-70N) TWS anomalies (mm) from GRACE/FO, ERA5-Land, and ERA5 vertically integrated moisture flux convergence, b ERA5-Land precipitation (P), evapotranspiration (ET), and runoff (RO), c same as b but for GPCP P, GLEAM ET and G-RUN RO. Units in b and c are mm d−1, d 2003–2022 trend in ERA5-Land P-ET, e Same as d but for GPCP v3.2 P—GLEAM 3.6a ET. Units in d and e are mm d−1/yr. All anomalies are relative to the 2003–2022 monthly resolved climatological mean
TWS trends (mm/yr) over the period 2003–2022 in a GRACE/FO and b ERA5-Land; and c correlations of monthly TWS anomalies between GRACE/FO and ERA5-Land. Ice sheets and areas of significant glacial extent have been masked
Public
💧🌏 Greg Cocks

Permafrost - A Central Hub For Permafrost Information In Canada.
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geo.ca/communities/permafrost/
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“As #GeographyAwarenessWeek approaches, it's the perfect time to highlight Canada’s permafrost - a crucial component of our northern ecosystems that plays a key role in shaping both our environment and infrastructure.
[You are] invite[d] to discover GEO.ca’s new Permafrost Community space, a go-to resource for anyone interested in learning more about permafrost thawing and its impacts across Canada…”
#Permafrost #GeoDiscovery #ClimateChange #GIS #spatial #mapping #arctic #spatialanalysis #spatiotemporal #geography #canada #spatiotemporal #northern #ecosystems #infrastructure #change #damage #carbon #carbonstorage #environment #foodweb #melt #melting

map - permafrost and carbon stored in peat, Canada
photo - helicopter landed on melting permafrost, Canada
photo - researchers measuring thawing permafrost on Herschel Island, a few kilometres off the Yukon coast. Dramatic changes to landscapes in the North could be accelerated by the permafrost carbon feedback loop.
aerial image - The Mackenzie River system is Canada’s largest watershed, and the tenth largest water basin in the world. Parts of the watershed sit atop permafrost, making it vulnerable to climate change. Approximately 40 per cent of Canada’s landmass overlays permafrost.
Public
💧🌏 Greg Cocks

Daniel Coe’s Astonishing River Cartography
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orionmagazine.org/article/dani <-- shared media article
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dancoecarto.com/work <-- his website
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[those in the spatial hydrology ‘world’ have long been incredibly impressed by Dan Coe’s imagery and cartography, here is a wonderful article on cartography & science with his visual arts quality]
“Cartographer Daniel Coe uses relative elevation data, primarily from plane-mounted lasers called lidar, to visualize Earth’s natural features, like rivers and floodplains. His stunning river maps reveal stories hidden in historical sediment and past channels carved by the water, as it twists and turns through both landscape and time…
No man steps in the same river twice, for it is not the same river and he is not the same man. – Heraclitus…”
#GIS #spatial #mapping #DanielCoe #cartography #hydrospatial #river #riverine #imagery #representation #map #representation #science #remotesensing #LiDAR #sedimentation #flooding #riverchannel #change #spatiotemporal #gischat
#DanielCoe

LiDAR-derived river cartography - Mississippi Delta, USA
LiDAR-derived river cartography - Murray River, Australia
LiDAR-derived river cartography - bends in the North Fork Shenandoah River, Virginia, USA
LiDAR-derived river cartography - Tulsequah River, British Columbia, Canada
Continued thread
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Laurent Perrinet

Here, we display the performance of the algorithm on the DVSgesture dataset. For this gesture recognition task, the online HOTS accuracy remains close to the chance level for about 100 events. More evidence needs to be accumulated, and then the accuracy increases monotonically, outperforming the previous method after about 10.000 events (at an average of 9.3% of the number of events in the sample) :

Performance of the algorithm on the DVSgesture dataset. For this gesture recognition task, the online HOTS accuracy remains close to the chance level for about 100 events. More evidence needs to be accumulated, and then the accuracy increases monotonically, outperforming the previous method after about 10.000 events (at an average of 9.3% of the number of events in the sample).
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