Dear Amir Farshadfar,
Here are some information sources that I hope will answer your questions.
1. Some commercial sources for high-resolution DEMs
https://www.pgc.umn.edu/data/earthdem/
https://www.l3harris.com/all-capabilities/elevation-data-digital-elevation-models
https://www.prnewswire.com/news-releases/capella-space-releases-the-highest-resolution-commercial-sar-imagery-in-the-world-301193732.html#:~:text=Highest%2Dresolution%20%E2%80%93%20Capella%20Space's%2050,1%20m%20x%2025%20cm
2. DEM resolution explained
https://www.jbarisk.com/news-blogs/dem-spatial-resolution-what-does-this-mean-for-flood-modellers/#:~:text=The%20spatial%20resolution%20of%20a,metre%20area%20of%20physical%20land
https://resources.arcgis.com/en/help/main/10.1/index.html#//009t00000004000000
https://storymaps.arcgis.com/stories/302b735ca1954bfb91b3f3265fc469ad
Here are some information sources that I hope will answer your questions.
1. Some commercial sources for high-resolution DEMs
https://www.pgc.umn.edu/data/earthdem/
https://www.l3harris.com/all-capabilities/elevation-data-digital-elevation-models
https://www.prnewswire.com/news-releases/capella-space-releases-the-highest-resolution-commercial-sar-imagery-in-the-world-301193732.html#:~:text=Highest%2Dresolution%20%E2%80%93%20Capella%20Space's%2050,1%20m%20x%2025%20cm
2. DEM resolution explained
https://www.jbarisk.com/news-blogs/dem-spatial-resolution-what-does-this-mean-for-flood-modellers/#:~:text=The%20spatial%20resolution%20of%20a,metre%20area%20of%20physical%20land
https://resources.arcgis.com/en/help/main/10.1/index.html#//009t00000004000000
https://storymaps.arcgis.com/stories/302b735ca1954bfb91b3f3265fc469ad
Statistics: Posted by ASF - bhauer — Sat Apr 06, 2024 7:22 pm America/New_York