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#hydrography

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Public
💧🌏 Greg Cocks

Elevation-Derived Hydrography [EDH] - The USGS’s Rich New Hydrological Features Dataset
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doi.org/10.2489/jswc.2024.0314 <-- shared paper
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pubs.usgs.gov/publication/tm11 <-- USGS EDH Representation, Extraction, Attribution, and Delineation Rules reference publication
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usgs.gov/3d-hydrography-progra <-- shared link to the USGS 3DHP page
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[in my role, I have the pleasure of working with the valuable EDH process(es) and the data it produces on a daily basis]
#GIS #spatial #mapping #water #hydrology #hydrography #3dep #edh #3dhp #elevationderivedhydrography #opendata #elevation #dem #dtm #interpretation #waterfeatures #usecase #waterresources #floodmodeling #alignment #model #modeling #dataset #naturalresources #costs #benefits #economics #businessuse #publicdata #spatialanalysis #USA #USGS
@USGS

map - Geomorphon index data overlaid on hillshade data for Elevation-Derived Hydrography production
maps - (a) Using contours and (b) geomorphon index to validate and refine stream location in Elevation-Derived Hydrography dataset.
maps - Progression of developing derived stream features from a Digital Elevation Model (left to right).
LiDAR base map / image - stream and road, false colour
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💧🌏 Greg Cocks

New [2018] 30 Metre Resolution Global Shoreline Vector And Associated Global Islands Database For The Development Of Standardized Ecological Coastal Units
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doi.org/10.1080/1755876X.2018. <-- shared 2018 paper
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#GIS #spatial #mapping #coast #coastline #global #shoreline #landsat #remotesensing #spatialanalysis #extraction #AI #machinelearning #GSV #GSHSS #ecology #terrestrial #marine #ECU #waters #GEO #GoogleEarthEngine #MBON #BluePlanet #water #hydrography #hydrospatial #GroupOnEarthObservations
@GroupOnEarthObservations #islands @GEOSEC2025

maps - Top – The GSV along the Florida keys in the United States. The continental mainland of North America is shown in tan, islands > 1 km2 in area are shown in green, and islands < 1 km2 are shown in red. These landmasses are depicted at a 1:1,000,000 scale. Bottom – For cartographic reference, the same area of the Florida Keys
maps/landsat image - A visual comparison of the GSV and the GSHHS (Wessel and Smith Citation1996) for an archipelago at the westernmost end of the Florida Keys, United States. The underlying image is from a 1:65,000 level zoom of Esri's World Image Basemap. The yellow lines represent shorelines from the GSHHS, and the red lines depict GSV shorelines. Only the largest polygon shown is > 1 km2. The GSV shows improvement in the visual fit of the coastline vectors to the shore.
photo - shoreline, Florida Keys, USA
annonated map - Illustrative example of the ecological coastal units (ECUs) spatial analytical framework showing the new Global Shoreline Vector (GSV) along a stretch of coast in northeastern Puerto Rico. The GSV is shown with regularly spaced segments attributed and symbolised, in this case, by sinuosity. Perpendicular transects placed at segment intervals are also shown. The segments and transects represent potential spatial objects which could be attributed with data and used to delineate ECUs. The proposed ecological zonation is also shown, including offshore (a) and nearshore (b) coastal waters separated by the 30 m depth contour, and coastal land areas (c) between the GSV and the inland limit of the coastal plain.
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💧🌏 Greg Cocks

Historical Geospatial Dataset Of Cyprus From British Administration Maps Of The 19th Century
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doi.org/10.1016/j.dib.2024.111 <-- shared paper
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kitchener.hua.gr/en <-- storybook / historic maps
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[as a ‘colonial’ myself (New Zealand), I have a fascination with this sort of history – and throw in some early-ish survey and national cartography not long after Cyprus was ceded by the Ottomans…]
#GIS #spatial #mapping #Cyprus #hydrology #hydrography #landcover #population #demographics #survey #cartography #French #tradition #triangulation #national #colonial #British #administration #Kitchener #roads #infrastructure #cultural #history #historic #census #spatiotemporal #HistoricalGIS #takingstock

The land cover/use according to Kitchener's map
The stream network as symbolized on the [Kitchener] map
Detailed examples of the land cover/use raster layer (scale 1:25 000)
map portion - and 1870s painting, cover & map key insets
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💧🌏 Greg Cocks

USGS Releases ‘The 3D National Topography Model [3DTNM] Call For Action - Part 1: The 3D Hydrography Program [3DHP]’
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usgs.gov/news/technical-announ <-- technical announcement
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pubs.usgs.gov/publication/cir1 <-- USGS Circular 1519 publication link
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usgs.gov/3DHP <-- shared USGS 3DHP home page
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internetofwater.org/ <-- shared Internet of Water home page
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[ nice to see this, although I am maybe biased ~wink~ ]
#GIS #spatial #mapping #water #hydrology #surfacewater #3D #opendata #3DHP #3DEP #EDH #3DTNM #elevationderivedhydrology #topography #hydrography #CallForAction #publicdata #HYFeatures #opensource #IOW #InternetOfWater #DEMs #digitalinfrastructure #waterresources #resourcemanagement #inventory #planning
@USGS

Maps showing the improved alignment possible in the 3D Hydrography Program by using hydrography data derived from high-quality elevation data from the 3D Elevation Program (3DEP). The example maps show topography and streams near the border between Skagit and Snohomish Counties in Washington.
map - Example of hydrography derived from 3DEP lidar data for a section of the Marshyhope Creek near Federalsburg, Maryland.
Block diagram showing elevation data being collected over natural and human-made environments. Built using high- resolution 3D Elevation Program and 3D Hydrography Program data, the 3D National Topography Model (3DNTM) will incorporate other critical landscape information such as landcover, structures, transportation, and geology to inform a comprehensive understanding of the landscape to enable data-driven decisions and science. The 3DNTM aspires to augment today’s airborne-acquired elevation data with data acquired from a variety of platforms including satellite, drone, and potentially others. Hydrography data for lakes, rivers, and reservoirs will be derived from that elevation data to form an integrated representation of the landscape that can be connected with other water features such as wetlands and groundwater.
Digial elevation model of USGS site 365149109492300 Laguna Creek below Dennehotso near Kayenta, AZ.
Public
💧🌏 Greg Cocks

How Earth Would Look If All The Ice Melted [global video simulation]
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youtu.be/VbiRNT_gWUQ?si=M5J3l9 <-- shared video simulation
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“We learned last year that many of the effects of climate change are irreversible. Sea levels have been rising at a greater rate year after year, and the Intergovernmental Panel on Climate Change estimates they could rise by another meter or more by the end of this century.
As National Geographic showed us in 2013, sea levels would rise by 216 feet if all the land ice on the planet were to melt. This would dramatically reshape the continents and drown many of the world's major cities…”
#GIS #spatial #mapping #model #modeling #sealevel #sealevelrise #gischat #ice #icemelting #globe #global #earth #elevation #climatechange #water #hydrology #hydrography #simulation #hydrospatial #video #animation

YouTubeHow Earth Would Look If All The Ice Melted | Science InsiderBy Insider Science
Public
💧🌏 Greg Cocks

Revealing Hidden Depths - Seabed 2030 [podcast]
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buzzsprout.com/2093154/1342982 <-- link to podcast
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doi.org/10.3390/geosciences802 <-- shared 2018 ‘overview’ paper
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“In [their] first episode Head of Partnerships Steve Hall introduces Seabed 2030 with a summary of the history of mapping the ocean floor from earliest times to the present day...
Find out more about Seabed 2030 at www.seabed2030.org
Find out more about GEBCO at gebco.net/...”
#GIS #spatial #mapping #hydrospatial #hydrography #bathymetry #survey #Seabed2030 #marine #ocean #global #remotesensing #sonar #GEBCO #oceanfloor #seabed #international #topobathy #history #opendata
The Nippon Foundation##

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💧🌏 Greg Cocks

Instructional Videos on Using [USGS’s] The National Map [Open Data] Products and Services [3DEP Elevation, Hydrology, etc]
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usgs.gov/programs/national-geo <-- shared technical training resource
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usgs.gov/programs/national-geo <-- background to the USGS’s Accessible National Map Open Data
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#GIS #spatial #mapping #USGS #opendata #elevation #hydrography #hydrology #NGTOC #NGP #3DEP #3DHP #topoBuilder #USA #gischat #TNM #TheNationalMap #products #services #dataportal #tutorials #tutorial #trainingvideos #videos #learning #continuingeducation #education #educationandtraining #free #videolessons #videolearning #topographic #topographicmaps #instructional #onlineclasses #onlineeducation #onlinelearning
@usgs

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💧🌏 Greg Cocks

At What Scales Does A River Meander? Scale-Specific Sinuosity (S3) Metric For Quantifying Stream Meander Size Distribution
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doi.org/10.1016/j.geomorph.202 <-- shared paper
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“HIGHLIGHTS:
• Scale-specific sinuosity (S3) summarizes bend sizes of linear features and associated contributions to sinuosity across a range of scales.
• The S3 plot is analogous to a frequency histogram of bend sizes, like a fingerprint or a spectral signature
• The S3 is an easily computed metric to assess influential scales in bend patterns of linear stream features
• The paper formalizes a relation between sinuosity and fractal dimension..."
#GIS #spatial #mapping #multiscale #water #hydrography #streamgeometry #meanderpattern #meander #fractaldimension #sinuosity #model #modeling #spatialanalysis #bends #distribution #S3 #fractals #geometry #landscape #geomorphology #geomorphometry #prediction #spatialanalysis #coast #coastal #automatedanalysis #riverbend #appliedscience

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