By paul frommelt, office of corporate communications high resolution elevation data from the shuttle radar topography missionlevel 2 srtm 2, previously only available for the united states, will be made publicly available over the next 12 months, the white house announced today at the united nations heads of state climate summit in new york. Onemeter dem surfaces are seamless within collection projects, but, not necessarily seamless across projects. The high resolution orthoimagery collection was acquired through usgs contracts, partnerships with other federal, state, tribal, or regional agencies, and direct purchases from private industry vendors. I read about the new version of the digital elevation model at 30 meters srtm 30 meters, but i can not find from were i can download it. When no highresolution auxiliary dem is available, the 30 second srtm30. The srtm digital elevation data, produced by nasa originally, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data for large portions of the tropics and other areas of the developing world.
Nga releases highresolution elevation data to public. Laz in cloud when exporting lidar data urls to text from the cart the user can specify whether to include files in laz only, las only or both formats if both types are present in the cart. Download srtm 30m digital elevation models for free. Click on yellow tiles to download their corresponding data. High resolution digital elevation model hrdem canelevation series the product high resolution digital elevation model hrdem is part of the canelevation series created in support to the national elevation strategy implemented by nrcan. The shuttle radar topography mission srtm wikipedia article is a nasa mission conducted in 2000 to obtain elevation data for most of the world. This project will focus on free high resolution datasets with a spatial resolution of 30 meters and. Sep 30, 2014 enhanced elevation datasets covering remaining continents and regions will be made available within one year, with the next release of data focusing on latin america and the caribbean region. If its obviously not free data, then dont add it, please.
The shuttle radar topography mission srtm obtained elevation data on a nearglobal scale to generate the most complete highresolution digital topographic database of earth. The announcement was made at the united nations heads of state climate summit in new york. We will use the asf website as of 28th october 2019 to download the 12. It appears that the global 1arcsecond 30m srtm digital elevation model is now being made publicly available. These files are available for download in both arcinfo ascii format, and as. The new data are available for download from the usgs eros data.
Differences to the original srtm data can be substantial. The resolution for srtm void filled data is 1 arcsecond for the united states. It is a digital elevation model for whole world created and distributed by usgs. If you are new to srtm, i would recommend you to read the wikipedia. Earth explorer can be used to download the data, it is under the digital elevation category. Resolution is typically defined in either geographic reference arc second, or rectangular grid precise meter spacing. Free digital elevation model dem and free satellite data. High resolution free dem data released for africa igis.
The shuttle radar topography mission srtm is an international research effort that obtained digital elevation models on a nearglobal scale from 56s to 60n, to generate the most complete highresolution digital topographic database of earth prior to the release of the aster gdem in 2009. Srtm consisted of a specially modified radar system that flew onboard the space shuttle endeavour. I want to download high resolution dem data, ideally srtm 30 m resolution for 120 countries. Apr 22, 2020 the elevations in this dem represent the topographic bareearth surface. This interface attempts to ease the pain of downloading 30meter resolution elevation data from the.
Elevation data provides height above the sea level in meters for every single place in the world, measured for regions of approximately 30x30 meters. How can i download srtm data of 30 m resolution for research in remote sensing. It provides or generates a global scale of high resolution digital topography database. Despite its highresolution and greater coverage 80% of the earth, dissatisfied users expressed. This makes the file size several times larger than a well. This important announcement by the white house was followed by a near instantaneous release of large portions of 30m data over africa.
The national aeronautics and space administration nasa. The mission collected elevation data from 56s to 60n and was the highest resolution topographical database at the time of acquisition more. Srtm consisted of a specially modified radar system that flew onboard the space shuttle endeavour during an 11day mission in february of 2000. Srtm dem data is being housed on the usgs earth explorer. Usgs eros archive aerial photography high resolution. Where can i download free dems higher than 30m resolution in. Elevation data digital elevation models l3harris geospatial.
The shuttle radar topography mission srtm is an international research to obtain the digital elevation model dem of the earth. But heres a usgs earth explorer download guide to help you get started. I am aware of downloading dem data using the raster and elevatr packages. The elevations in this dem represent the topographic bareearth surface. Flown on a space shuttle mission during 2000, srtm elevation data covers our globe from 60 degrees north to 56 degrees south and was previously only available at 30m resolution over the usa. The best way of downloading srtm and other remote sensing based. How to download free dem digital elevation model, you can also downlaod sentinel 1a data and sentinel 1b link. The raster files register precisely with the 10m vector data. Srtm 90m digital elevation database cgiar platform for. The global high resolution soilwater balance dataset provides hydrological raster data esri grid format describing actual evapotranspiration and soil water deficit with the resolution of 30 arc seconds 920 m at the equator. Oct 28, 2019 alaska satellite facility asf is one of the daac providing various data sources to the public for free. Download high resolution dem alos palsar rtc corrected dem.
We are looking for any free terrain data for anywhere in the world. Aug 06, 2017 this video teaches you how to download alos palsar dem data. A smaller postspacing gives the data a higher resolution and therefore more terrain detail. However, these packages provide the srtm 90 m resolution.
Two versions of the 10 millionscale raster data are offered. Shuttle radar topography mission data were used to generate digital elevation data with a resolution of 1 arcsecond for the united states and 3 arcseconds for global coverage. Where can i download free dems higher than 30m resolution. Apr 08, 2014 the shuttle radar topography mission srtm obtained 90 meter 3 arcsecond resolution data on a nearglobal scale between 56 degrees south and 60 degrees north latitude and 30 meter 1 arcsecond resolution over united states, providing a valuable global topographic dataset. Although worlddem based on tandemx with 12m resolution provides superior quality over srtms 30 m, it may not be freely available. Mapping freely available high resolution global elevation and vector data in grass. Sep 23, 2014 high resolution topographic data generated from nasas shuttle radar topography mission srtm in 2000, previously only available for the united states, will be released globally over the next year, the white house announced today. The ministry of economy, trade, and industry meti of japan and the united states national aeronautics and space administration nasa jointly announced the release of the advanced spaceborne thermal emission and reflection radiometer aster global digital elevation model version 3 gdem 003, and the aster water body dataset astwbd on. There is a new, 30 meters resolution srtm dtm coming out. Download srtm 30m digital elevation models for free youtube. The srtm digital elevation data, originally produced by nasa, is a major breakthrough in digital mapping of the world, and provides a major advance in the accessibility of high quality elevation data for large portions of the tropics and other areas of the developing world. It is the current dataset of choice for digital elevation model dem data since it has a fairly high resolution 1 arcsecond, or around 25 meters, has nearglobal coverage from 56s to 60n, and is in the public domain. Download 30meter srtm data easily with this point and click. Free satellite data, satellite imagery, digital elevation models dems, topographic maps and free software links.
This interface attempts to ease the pain of downloading 30meter resolution elevation data from the shuttle radar topography mission click on yellow tiles to download their corresponding data. Data can be downloaded using a browser or accessed directly from the ftp site. This project will focus on free high resolution datasets with a spatial resolution of 30 meters and below on countystate scale. More and more dem data sets are published under free licenses or as public domain. Alaska satellite facility asf is one of the daac providing various data sources to the public for free. The srt mission obtained elevation data on a nearglobal scaleto generate the first nearly complete highresolution digital topographic database of the earths topmost surfaces. Srtm 30 m resolution download by country function or package. Natural earth features 7 types of raster files at 1. On september 23, 2014, the white house announced that the highest resolution topographic data generated from nasas shuttle radar topography mission srtm in 2000 was to be released globally by late 2015. Apr 27, 2017 how to download free dem digital elevation model, you can also downlaod sentinel 1a data and sentinel 1b link. The best way of downloading srtm and other remote sensing based dems is using open topography ot site. Cgiar srtm is a heavily edited version of the original srtm data.
Which dem data is better for elevation mapping, aster or srtm satellite data. When no highresolution auxiliary dem is available, the 30 second srtm30 dem is. Free for all nearglobal 30meter srtm elevation data. As stated on the nasa jpl official page, the next release is planned for later in 2014, and it is expected to include all of south america plus north. It appears that the global 1arcsecond 30m srtm digital elevation model. I have a buffer area of 100km from the coastline and only require the data for these areas. It has not the greatest resolution, approximately 1 km and split into 33 tiles available in usgs dem file format.
High resolution data comes with a price in terms of larger file sizes, potential increase in processing times, limited coverage. Usgs ascii dem format is not particularly good as a data format because it is ascii. The srtm 90m dems have a resolution of 90m at the equator, and are. Usgs standard onemeter dems are produced exclusively from high resolution light detection and ranging lidar source data of onemeter or higher resolution. Through inspire in europe more and more will follow.
Since data came from a variety of sources, the resolution, area of coverage, file size, and projection varies by dataset. Free 30meterresolution elevation data for most of the world. Access digital elevation data about australias landforms and seabed, which is crucial for addressing the impacts of climate change, disaster management, water security, environmental management, urban planning and infrastructure design. Since then the schedule was accelerated, and all global srtm data. Digital elevation shuttle radar topography mission srtm usgs. A comparison is often made to the best current worldwide database, srtm90, which has a poorer 90meter horizontal resolution and limited coverage at high northsouth latitudes. Under the data sets tab, select digital elevation srtm srtm 1arcsecond global.