Skip to content
USRADIOGUY

USRadioguy.com

Welcome to USRadioguy.com – Unlocking the Potential of Software Defined Radio

  • Home
    • Home of USRadioguy
    • USRadioguy Newsletter
    • Tried and Tested Hardware
    • What is RTL-SDR?
    • Global Weather Data
  • Satellite Reception
    • Geo Stationary Satellites
      • Geo-stationary Satellite Imagery Reception
      • GOESTOOLS on the PI
      • Update Goestools for GOES 18,19
      • Receiving GOES with SatDump CLI Mode
      • GOES receiving in Windows for SatDump GUI
      • Decoding EWS-G1/EWS-G2
      • GOES GRB Reception WIP
      • Optimizing a WIFI Grid Antenna for Maximum Efficiency
    • APT Satellites
      • APT RECEPTION
      • Satdump for Meteor and NOAA decoding
      • METEOR M2- Series
      • WxtoImg Fix
      • Converting to new TLE format
      • Layering Fire and Hotspot Data on Meteor Sat Imagery
      • HRPT Satellite Tracking and Capture
    • Receiving Other Satellites
      • Inmarsat Decoding
      • Receiving the Funcube Amateur Satellite
    • User Maps and Dish Pointers
      • Satellite Dish Pointer
      • User Global Ground Station Maps
      • Usermap rendered with Cesium
      • Global Map of Govt Dish Stations
    • Satellite Details & Information
      • ORBITAL DYNAMICS 101
      • HRIT/EMWIN & GRB Defined
      • Mesoscale Imagery Defined
      • Viterbi, R/S Errors, Packets
      • GOES BAND IMAGERY
      • Stray Light Zone (SLZ)
      • Drifting a geostationary satellite
      • GOES-R Series Multimedia Tour
      • Online Satellite Imagery and Information
      • Satellite Frequencies
      • Solar and Space Weather
  • Satellite Imagery
    • IMAGERY- Current GOES East & West HRIT Satellite Imagery
    • IMAGERY- GOES 16&18 – Past 96 Hours of Imagery
    • High Resolution Imagery
    • Daily 3D view of Earth
    • NOAA APT Satellite imagery
    • PlanetMaker
    • GOES16 A full year of received imagery
  • Imagery Processing
    • Custom Color Lookup Table & Gradients
    • GOES-R Custom Imagery Scripts
    • Global geo-ring composites
    • MODIS VIIRS Global Coverage
    • 3D Satellite Tracking
    • The quest for True Color Imagery
    • 3D animation of realtime data
    • Layering Geo-Spatial Fire Data into Satellite Imagery
    • Orbital dynamics and the Moon
    • National Hurricane Data
  • News, VLOGS & BLOGS
    • News & USRadioguy Blogs
    • USRadioguy VLOGS
  • Project Lab
    • Orbital Information and Visualizations
      • Enhanced Planet Earth
      • Satellites in Orbit
      • Solar System
      • Objects in Orbit
    • Current Station Weather
      • Current Groundstation Weather
      • Global Weather Data
      • Space Weather
    • WWII RADIO
      • WWII K-24 Aerial Camera
      • WWII RADIO
      • RADIO SET SCR-284
      • VS-3 VIBRATOR CONVERSION
      • VIBRATOR CONVERSION MODULE
      • BD-71 Field Switch Board and EE-8B Field Telephones
      • R-100/URR 1944 MORALE RADIO
      • A PORTABLE WWII ERA “MORALE RADIO”
      • AN/GRR-5 THE ANGRY 5
      • WWII Audio Page
    • Raspberry Pi Projects
      • ADS-B Reception
      • Allsky Camera
      • Pi Based Picture Frame
      • PI Based Broadcastify Server
      • Solar Power for PI
    • Hubble Space Telescope Data Processing
    • Zombie Satellites
    • DRONES
  • About Me
    • About Usradioguy
      • SETEC Astronomy
    • Tried and Tested Hardware
    • Rare Captures
    • My Other Interests
    • Presentations
    • Merchandise
    • Privacy Policy
  • Home
  • Science
  • Satellite imagery reprojection method

Satellite imagery reprojection method

Posted on April 13, 2023April 29, 2023 By Carl
Satellites, Science, Software

Loading

One of the fun parts of receiving satellite imagery is what you can do with the post-processing of the images. Map projections are mathematical models that allow us to represent a three-dimensional surface of the Earth on a two-dimensional map. There are many types of map projections, and each has its own set of advantages and disadvantages depending on the purpose of the map.

Cartography is the science and art of creating maps. The word “cartography” comes from the Greek words “chartis” meaning “map” and “graphein” meaning “to write”. Cartographers use a variety of tools and techniques to create maps that accurately represent the Earth’s surface, including satellite imagery, aerial photography, and GIS (geographic information system) software.

Maps are used for a variety of purposes, including navigation, land use planning, environmental analysis, and scientific research. Cartographers must consider the purpose of the map, as well as the intended audience when creating their maps. They must also take into account the inherent distortions that occur when representing a three-dimensional surface on a two-dimensional map. Through careful design and attention to detail, cartographers are able to create maps that are not only accurate but also aesthetically pleasing and easy to read.

In this example:

Created by stitching together imagery from 7 different Geo Satellites and then using Sanchez to create the base equirectangular projection. This was the base map I used with the software G.Projector from NASA.

Map projections are mathematical models that allow us to represent a three-dimensional surface of the Earth on a two-dimensional map. There are many types of map projections, and each has its own set of advantages and disadvantages depending on the purpose of the map.

One popular software for creating and visualizing map projections is NASA’s G.Projector. G.projector is free software that allows users to create, view and modify map projections in a variety of formats. https://www.giss.nasa.gov/tools/gprojector/

To use g.projector, users first need to open the map they wish to modify. If it is like mine above (equirectangular), then the default input coordinates will be correct. Feel free to download the image above and try it out! Next, choose the type of map projection you want to create. There are many available, including cylindrical, conic, azimuthal, and a wide selection of miscellaneous projections. Once the projection type is selected, users can then customize the projection parameters such as the central meridian, standard parallel, and map scale.

G.projector also allows users to add data to their maps, including vector and raster data. Users can import shapefiles, KML files, and GeoTIFFs and overlay them onto their map projections. Additionally, g.projector includes tools for adding annotations and legends to maps, allowing users to create fully customized, publication-quality maps.

Sample Projections created with G.Projector and the image at the top of the page.

One important consideration when working with map projections is distortion. Because we are representing a three-dimensional surface on a two-dimensional map, there will always be some distortion in the representation. Different map projections have different types and degrees of distortion, and it is important to choose a projection that minimizes distortion for the intended purpose of the map.

Map projections are essential tools for creating accurate and useful maps. NASA’s g.projector is a powerful and flexible software that allows users to create and visualize map projections in a variety of formats. When working with map projections, it is important to consider the purpose of the map and choose a projection that minimizes distortion for that purpose.

Post navigation

❮ Previous Post: SARSAT: The Technology Behind Saving Lives
Next Post: NOAA Requests proposals to limit 5G (6G) interference. ❯

You may also like

NOAA 15
Satellites
NOAA 15,18,19 to transition to private On-orbit operations
October 20, 2022
Satellites
GOES-U on track for April Launch
March 3, 2022
Satellites
OIG reccomends changes to NOAA GOES launch schedule/storage
January 26, 2022
Hardware
Kraken Discovery Dish Progress
June 28, 2024

Please, Help Support USRadioguy.com

If you like what I do please support me on Ko-fi, It really means a lot, every bit helps!

Hardware Humor Imagery Processing Interesting stuff you should know! Launch News Life News Product Review Satellites Science Software Space Weather Uncategorized VLOG

Alphabetical Listing of all Pages on site:

  • 36-Hour Imagery Processing script
  • 3D animation of realtime data
  • A PORTABLE WWII ERA “MORALE RADIO”
  • About Me
  • ADS-B Reception
  • Allsky Camera
  • AN/GRR-5 THE ANGRY 5
  • BD-71 Field Switch Board and EE-8B Field Telephones
  • Current GOES 16 & 18 False Color Satellite Imagery
  • Custom Color Lookup Table
  • Custom Imagery Scripts for GOES
  • Daily 3D view of Earth
  • Daily Global Composites
  • Decoding EWS-G1 or GOES-13
  • Drifting a geostationary satellite
  • DRONE FUN
  • Even the kitchen sink
  • GEO-RING COMPOSITES
  • GEO-SAT PI FRAME
  • Geo-stationary Satellite Imagery Reception
  • Global Weather Data
  • GOES 19&18 – Last 96 Hours of Imagery
  • GOES BAND IMAGERY
  • GOES GRB Reception
  • GOES receiving in Windows for SatDump
  • GOES-18 Preparing for a new satellite
  • GOES-R Series Multimedia Tour
  • GOES-U (19) Countdown to Launch
  • GOES16 A full year of received imagery
  • Ground Station Map
  • High Resolution Imagery
  • Home
  • House History
  • HRIT/EMWIN & GRB
  • HRPT Satellite Tracking and Capture
  • Hubble Space Telescope Data Processing
  • Inmarsat Decoding
  • Layering Fire and Hotspot Data on Meteor Sat Imagery
  • Layering Geo-Spatial Fire Data into Satellite Imagery
  • Mesoscale Imagery Defined
  • METEOR M2- Series
  • MODIS VIIRS Global Coverage
  • My Other Interests
  • NASA, NOAA, Military, GOVT dish, and tower stations.
  • National Hurricane Data
  • Newsletter terms & conditions
  • NOAA & Meteor APT and LRPT RECEPTION
  • Online Satellite Imagery and Information
  • Optimizing a WIFI Grid Antenna for Maximum Efficiency
  • ORBITAL DYNAMICS 101
  • Orbitron, Gpredict, and PSTRotator with new TLE format
  • PI Based Broadcastify Server
  • Pi Based Picture Frame
  • Presentations
  • Privacy Policy
  • Programming the PI for goestools operation
  • R-100/URR 1944 MORALE RADIO
  • RADIO SET SCR-284
  • Rare Captures
  • Receiving GOES 18,19 with goestools
  • Receiving GOES HRIT with SATDUMP
  • Receiving the Funcube Amateur Satellite
  • Satdump for Meteor and NOAA decoding
  • Satellite Finder
  • Satellite Frequencies
  • Satellite Ground Stations
  • Satellite Tracking
  • Security
  • SETEC Astronomy
  • Solar Power for PI
  • South America GOES 16
  • Space Weather
  • Stray Light Zone (SLZ)
  • Thanks!
  • The quest for True Color Imagery
  • Tried and Tested Hardware
  • Usradioguy Blogs
  • Usradioguy Merchandise
  • USRadioguy Newsletter
  • USRadioguy VLOGS
  • USRADIOGUY Youtube Page
  • VIBRATOR CONVERSION MODULE
  • Viterbi, R/S Errors, Packets
  • VS-3 VIBRATOR CONVERSION
  • What is RTL-SDR?
  • WWII Audio Page
  • WWII K-24 Aerial Camera
  • WWII RADIO
  • WxtoImg Fix
  • Zombie Satellites

Hardware Humor Imagery Processing Interesting stuff you should know! Launch News Life News Product Review Satellites Science Software Space Weather Uncategorized VLOG

Satellite And Weather Related Feeds

  • CIMSS Satellite Blog
  • USRadioguy.com
  • wildfires
  • NASA Earth Observatory
  • SPC Particularly Dangerous Situation (PDS) Tornado/Severe Thunderstorm Watch
  • satellites
  • Satellites News -- ScienceDaily
  • Satellite Liaison Blog
Wildfire in Ontario produces a large pyrocumulonimbus cloud
Wildfire in Ontario produces a large pyrocumulonimbus cloud
American Samoa’s Wettest Year Gets Wetter
American Samoa’s Wettest Year Gets Wetter
Deadly flash flooding in Ruidoso, New Mexico
Deadly flash flooding in Ruidoso, New Mexico
Global cloud layers on your Devices
Global cloud layers on your Devices
End Of Life for NOAA 15 and 19?….not so fast…
End Of Life for NOAA 15 and 19?….not so fast…
Vitality GOES
Vitality GOES
The fire cycle
Unmasking the complicated chemistry of wildfire smoke: What's in it?
Unmasking the complicated chemistry of wildfire smoke: What's in it?
NOAA unveils powerful convergence of AI and science with revolutionary Next-Generation Fire System technology
NOAA unveils powerful convergence of AI and science with revolutionary Next-Generation Fire System technology
The Salty Lake of Gas Hure
The Salty Lake of Gas Hure
Greenland’s Bejeweled Ice Sheet
Greenland’s Bejeweled Ice Sheet
Manitoba Burning
Manitoba Burning
SPC PDS Severe Thunderstorm Watch 399
SPC PDS Severe Thunderstorm Watch 399
Five historically huge solar events
Five historically huge solar events
65 years since the world’s first weather satellite
65 years since the world’s first weather satellite
Investing in America: NOAA's Science, Service and Stewardship in Action
Earth’s weather satellites just spent 10 years watching Venus — here’s what they found
Record-breaking 10-billion-year radio halo just rewrote the universe’s origin story
Massive thread of hot gas found linking galaxies — and it’s 10 times the mass of the Milky Way
The Need for Speed: OCTANE Cloud-Top Winds at SPC
The Need for Speed: OCTANE Cloud-Top Winds at SPC
Summer Storms, Flooding Target Mid-Atlantic
Summer Storms, Flooding Target Mid-Atlantic
Southwest Thunderstorms – Late June 2025
Southwest Thunderstorms – Late June 2025
  • Facebook Geo Stationary Satellites
  • Usradioguy Facebook
  • Instagram
  • Reddit
  • Github
  • Linkedin

Copyright © 2025 USRadioguy.com - All Rights Reserved. All material protected by Fair Use Section 107 of the Copyright Act. This site is Verified and Secured with 256 bit SSL encryption