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After signing in, filters can be adjusted to isolate specific datasets. For InSAR analysis, Sentinel 1 (A or B) SLC datasets are required. Selecting data with short temporal ranges (6 day) is appropriate hazard assessments or rapid land cover changes. Sentinel 2 measures with a multispectral sensor and is a good supplement to any analysis done with the Sentinel 1 imagery. If desired, a cloud cover threshold can be selected to limit the product search to imagery that is below a certain percentage of cloud cover. This is an especially useful parameter to specify when looking for imagery in tropical regions where cloud coverage is often a problem in sensors which imager along regions of the electromagnetic spectrum that have short wavelengths (i.e. visible and infrared). | After signing in, filters can be adjusted to isolate specific datasets. For InSAR analysis, Sentinel 1 (A or B) SLC datasets are required. Selecting data with short temporal ranges (6 day) is appropriate hazard assessments or rapid land cover changes. Sentinel 2 measures with a multispectral sensor and is a good supplement to any analysis done with the Sentinel 1 imagery. If desired, a cloud cover threshold can be selected to limit the product search to imagery that is below a certain percentage of cloud cover. This is an especially useful parameter to specify when looking for imagery in tropical regions where cloud coverage is often a problem in sensors which imager along regions of the electromagnetic spectrum that have short wavelengths (i.e. visible and infrared). | ||
== '''[https://earthexplorer.usgs.gov/ Earth Explorer (USGS)]''' == | == '''[https://earthexplorer.usgs.gov/ Earth Explorer (USGS)]''' == | ||
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To quickly assess if the data set is right for your project, coverage shapefiles can be quickly downloaded. Most of the data sets on the EarthExplorer search engine have global coverage shapefiles which can easily be viewed through Google Earth. Links to these files can be accessed by clicking the information icon next to the data set ID, this will redirect you to a general information page on the instrument and data. At the bottom of these pages there are usually the links to the coverage shapefiles. | To quickly assess if the data set is right for your project, coverage shapefiles can be quickly downloaded. Most of the data sets on the EarthExplorer search engine have global coverage shapefiles which can easily be viewed through Google Earth. Links to these files can be accessed by clicking the information icon next to the data set ID, this will redirect you to a general information page on the instrument and data. At the bottom of these pages there are usually the links to the coverage shapefiles. | ||
== '''Earth Data (NASA and USGS)''' == | == '''Earth Data (NASA and USGS)''' == | ||
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There are many directories of spatial information which are rooted through the USGS. In addition to the information listed above, there are numerous GIS shapefiles which can be used individually or in conjunction with satellite imagery datasets and basemaps. These are available through the USGS data catalog where data from most of the topics in science is available (i.e. geology, hydrology, biology, geography etc.). All the data is open source, however the data published data should be noted and considered during analysis. GIS data included in this catalog includes datasets such as large mineral deposits, geological unit shapefiles, stream and river shapefiles, distribution of biological parameters, groundwater information, geomorphological feature distribution, fault line shapefiles and many more. Many of the shapefiles are specific to the United States but global datasets exist through this site as well. | There are many directories of spatial information which are rooted through the USGS. In addition to the information listed above, there are numerous GIS shapefiles which can be used individually or in conjunction with satellite imagery datasets and basemaps. These are available through the USGS data catalog where data from most of the topics in science is available (i.e. geology, hydrology, biology, geography etc.). All the data is open source, however the data published data should be noted and considered during analysis. GIS data included in this catalog includes datasets such as large mineral deposits, geological unit shapefiles, stream and river shapefiles, distribution of biological parameters, groundwater information, geomorphological feature distribution, fault line shapefiles and many more. Many of the shapefiles are specific to the United States but global datasets exist through this site as well. | ||
== '''DLR: EOWEB GeoPortal (EGP) and EOWEB''' == | == '''DLR: EOWEB GeoPortal (EGP) and EOWEB''' == | ||
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This site is focused on providing LiDAR datasets typically over regions in the United States. It includes information from SRTM, airborne LiDAR and additional global dataset information (including bathymetry data). There is an interactive map and data catalog to help with rapid data locating. | This site is focused on providing LiDAR datasets typically over regions in the United States. It includes information from SRTM, airborne LiDAR and additional global dataset information (including bathymetry data). There is an interactive map and data catalog to help with rapid data locating. | ||
== '''EOWEB''' == | == '''EOWEB''' == |