User Interface USGS Earth Explorer UI The interface uses Google Maps. You can zoom in and out with the mouse wheel as if you are in Google Maps.
Google street view is also enabled, where you can drop a marker and get a real view of the location. First, you’ll have to create an account with USGS. In the top-right corner, click the Register button. As it’s a pretty painless process, you’ll receive instructions to activate your account. In order to download data from USGS Earth Explorer, here are the four steps you’ll need to follow:. Set your search criteria. Select your data to download.
Filter out your data. Check your results and download.
Pro Tip: The easiest thing to do is just to zoom into your area of interest. If you want to download free Landsat imagery for Hawaii, zoom into that area. Now, select the Use Map button. Immediately after, zoom out a bit and you can see that you now have an area of interest in your map.
Alternatively, you can use one of these options to create a region of interest:. Using an address to search. Importing a shapefile (in a zip file) or KML.
Or you can just double-click the map to make your ROI You can also set a timeline for aerial and satellite imagery downloads in USGS Earth Explorer. You no longer need to search through a long list of acquisitions to find the correct date. This is a powerful tool that narrows down your search and saves you time. Step 2 Select your data to download in the “Data Sets” tab The Datasets tab answers the important question: What satellite or aerial imagery are you looking for? The USGS Earth Explorer remote sensing datasets are plentiful: aerial imagery, AVHRR, commercial imagery, digital elevation, Landsat, LiDAR, MODIS, Radar and more.
It depends on the date and time for which Landsat scene you can download. In the Landsat Archive group, the most recent Landsat imagery is L8 OLI/TIRS and L7 ETM+. The differences between the collections are based on data quality and level of processing. USGS will be based on quality and processing level.
Now that we’ve identified our area of interest of Hawaii in step 1, you can select a checkbox in the Landsat Archive category. On-demand means that you will be notified by email where you can download surface reflectance products from a separate interface for processing and data delivery. Step 3 Filter your data in the “Additional Criteria” tab 90% of people go into the “Additional Criteria” tab to easily filter out scenes with too much cloud cover.
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Now, you aren’t able to filter to obtain the perfect cloudless image everyone wants. But you can set the cloud level to less than 10%, and this is what most people want unless you’re into meteorological studies. Here’s a brief explanation what each set of criteria does:.
Set the which is a unique way for naming convention and includes WRS path and row within it. Filter the temporal condition of the scene as a day/night acquisition or nadir/off-nadir. Specific the quality of the scene with Level-1 (L1) data products being the best available processing level. The Processing Software Version is what was used to generate that L1 product. For the average user, you won’t need to set a lot criteria.
Other than cloud cover, you can move onto downloading your satellite imagery. Now that the date range, type of data and additional criteria are defined, the search results tab will populate with data sets that match your query. In the “Results” tab, you select the specific data set you want to download. But it’s good to check the footprint for exactly where that scene is located.
You can also preview the data, which can be good to see exactly where clouds are in the image. Download the data by clicking the “Download” button.
If you are going to performing analysis on the Landsat data, the Level 1 GeoTIFF data product is probably the one you’re after, which will be the largest file size. Let’s Recap: The USGS Earth Explorer gives a quick and intuitive way to download free aerial and satellite imagery. This tool gives a wide range of options. You can define the time period, geographic extent and imagery type. Test it out for free downloads of remote sensing imagery and more. Steps to Download USGS Earth Explorer Data:.
Set region of interest and time period. Specify the type of data you want.
Filter out the data that you don’t want. Search data sets and download.
A big part of the USGS Earth Explorer is the data available from the Landsat mission. We tell you exactly what are the spectral bands, spatial resolution and temporal information for its incredible +40 year history. Well, you downloaded the satellite data for some reason, right? What can you do with satellite imagery once you have it?
Satellite data like Landsat is made up of several spectral bands. These bands have combined to create a true color composite or false color composite. We have a guide to do this just for you. Need to classify the imagery?
You can use supervised, unsupervised and object-based image analysis. Don’t know the difference between them? If you want more satellite, this list of should quench your thirst.
On a side note, USGS Earth Explorer now warehouses data. This is really your best option for crisp 10-meter continous coverage of the planet.
If you have Geographic Information Systems (GIS) data, you can import it into Google Earth Pro so you can use it as part of your visualizations. If you have, you can import many kinds of GIS data directly using the methods described in this tutorial. If you are using the free version of Google Earth, there are other tools for converting GIS data to KML, a few of which are listed at the end of this tutorial. Is spatial data that is georeferenced to real-world locations on the Earth.
There are two types of GIS data, both of which you can import: vector data and raster data. Vector datasets consist of points, lines, or polygons representing objects on the map. Raster datasets are regular grids of data, which can represent images such as satellite or aerial photography, continuous surfaces such as elevation models, or thematic classes such as land cover or habitat maps. In order for Google Earth Pro to import your data and place it in the correct location on the Earth, all GIS data must have the correct coordinate system defined.
For example, ESRI shapefiles must have a projection file (.prj) associated with them and GeoTIFFs must have a Tiff World File (.tfw) associated with them. This tutorial will guide you through how to import GIS data into Google Earth Pro so it can be used as part of your Google Earth visualizations. We will import a shapefile of rivers and a GeoTIFF of land cover in Southeast Asia. The rivers dataset was created from data downloaded from the.
The land cover dataset was created from data downloaded from the. Prerequisites. Absolutely no programming skills needed!. For this tutorial, you will need Google Earth Pro installed on your computer. If you are a non-profit organization, you may qualify for a free license of Google Earth Pro. See eligibility requirements and apply for a Pro grant. If you are not a non-profit or do not qualify, you may buy Google Earth Pro or download a 7-day free trial.
Let's get started! Open Google Earth Pro. Download the following datasets for use in this exercise: and to your computer.
Unzip both files into a folder on your computer. Import a GIS shapefile, or other vector dataset 1. Select Import. From the File menu. American standard tub surround installation. Select your data's file type from the Files of type menu. For this example, choose ESRI Shape (.shp) from the file type menu, select RiversinSoutheastAsia.shp, and click Open.
If you have MapInfo.tab data, choose MapInfo (.tab) from the Files of type menu, select your TAB file and click Open. A message will appear, stating that the file contains more than 2500 features and could cause application performance degradation. When you see this message, you can choose to import just a sample, restrict to your current view, or import all.
Click the Import all button. A message will appear, asking if you would like to create a Style Template. In the next Style Template Settings dialog box, you will create a style template for the rivers, which will include colors, labels, and icons. Under the Name tab, choose the field in the shapefile that you would like to use for the name labels for the data in Google Earth.
You can use the preview table to view which field contains the content you would like to use for the labels. For this example, select 'NAM' in the drop-down menu.
This is the field in the shapefile that contains the names of the rivers. Under the Color tab, select to Use single color, and click on the color swatch to the right. This causes the color settings to appear. In the Select Color dialog box, choose a color for the river dataset. For this example, select a blue color, and click OK.
Under the Height tab, keep Clamp features to ground selected. This will keep the rivers clamped to the ground, following the terrain. Click OK to finish your style.
A dialog box will appear, asking if you would like to save the style template you just created. If you wish to save it for future use, click Save. Otherwise, click Cancel. For this example, click Save.
Your GIS data has been converted to KML, and the data now appears in Google Earth. Notice how the KML is also listed in the Places panel under your Temporary Places folder.
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To save it in Google Earth for future sessions, select and drag this file to your My Places folder before closing Google Earth. Once you have imported your vector dataset, you can optimize your files and limiting the number of points displayed at higher alititudes, by using the tool. Save your imported vector dataset as a KML, then choose Regionate under the Tools menu. For the Input file, browse for your saved KML file. Then choose an Output folder where you want to save the regionated files.
Check 'Open regionated files when done' and click Regionate. Now, as you zoom in, you'll see increasingly more points. Import GeoTIFF, or other raster dataset 1. To import a raster dataset, select Import. From the File menu. Select the appropriate file format from the file type menu at the bottom, select the file you want to import, and click Open. For this example, select file type GeoTIFF (.tif), select the LandCoverSEAsia.tif file, and click Open.
In the New Image Overlay dialog box that appears, give a name to your raster overlay, and click OK. Because the raster dataset in georeferenced to a coordinate system, it is automatically placed in the appropriate location. The land cover GeoTIFF has been imported into Google Earth and is located in the Places panel. If your imported image is larger than the maximum size supported by the hardware, you will be given several choices:. Click to import large images and have them automatically split into tiles and scaled according to your zoom level.
Click Scale to rescale to the maximum size supported. Click Crop to view only a full resolution subset of the image.
In addition to importing GIS data into Google Earth Pro, you can also use many other tools and software programs to convert GIS data to KML files for use in Google Earth. GIS software, like ESRI ArcGIS and MapInfo, have tools to export GIS data into KML format for use in Google Earth., a free utility that converts many formats, including shapefiles to KML., a free utility that converts shapefiles to KML. MapWindow GIS has, a tool for converting GIS data to KML. ESRI ArcGIS contains tools in the ArcToolbox (Conversion Tools To KML) for converting vector and raster GIS data to KML. is an extension for ArcGIS that converts GIS data to KML. The is a free tool that has lower limits than the full version. MapInfo Professional has a.
Discussion & feedback Have questions about this tutorial? Want to give us some feedback? Visit the to discuss it with others. Go to next tutorial:.
Prerequisites. Absolutely no programming skills needed!.
For this tutorial, you will need Google Earth Pro installed on your computer. If you are a non-profit organization, you may qualify for a free license of Google Earth Pro. See eligibility requirements and apply for a Pro grant. If you are not a non-profit or do not qualify, you may buy Google Earth Pro or download a 7-day free trial. Let's get started!
Open Google Earth Pro. Download the following datasets for use in this exercise: and to your computer. Unzip both files into a folder on your computer.
Import a GIS shapefile, or other vector dataset 1. Select Import. From the File menu. Select your data's file type from the Files of type menu. For this example, choose ESRI Shape (.shp) from the file type menu, select RiversinSoutheastAsia.shp, and click Open.
If you have MapInfo.tab data, choose MapInfo (.tab) from the Files of type menu, select your TAB file and click Open. A message will appear, stating that the file contains more than 2500 features and could cause application performance degradation. When you see this message, you can choose to import just a sample, restrict to your current view, or import all.
Click the Import all button. A message will appear, asking if you would like to create a Style Template. In the next Style Template Settings dialog box, you will create a style template for the rivers, which will include colors, labels, and icons. Under the Name tab, choose the field in the shapefile that you would like to use for the name labels for the data in Google Earth.
You can use the preview table to view which field contains the content you would like to use for the labels. For this example, select 'NAM' in the drop-down menu. This is the field in the shapefile that contains the names of the rivers.
Under the Color tab, select to Use single color, and click on the color swatch to the right. This causes the color settings to appear. In the Select Color dialog box, choose a color for the river dataset. For this example, select a blue color, and click OK. Under the Height tab, keep Clamp features to ground selected.
This will keep the rivers clamped to the ground, following the terrain. Click OK to finish your style. A dialog box will appear, asking if you would like to save the style template you just created. If you wish to save it for future use, click Save. Otherwise, click Cancel. For this example, click Save.
Your GIS data has been converted to KML, and the data now appears in Google Earth. Notice how the KML is also listed in the Places panel under your Temporary Places folder. To save it in Google Earth for future sessions, select and drag this file to your My Places folder before closing Google Earth. Once you have imported your vector dataset, you can optimize your files and limiting the number of points displayed at higher alititudes, by using the tool.
Save your imported vector dataset as a KML, then choose Regionate under the Tools menu. For the Input file, browse for your saved KML file.
Then choose an Output folder where you want to save the regionated files. Check 'Open regionated files when done' and click Regionate. Now, as you zoom in, you'll see increasingly more points. Import GeoTIFF, or other raster dataset 1. To import a raster dataset, select Import.
From the File menu. Select the appropriate file format from the file type menu at the bottom, select the file you want to import, and click Open. For this example, select file type GeoTIFF (.tif), select the LandCoverSEAsia.tif file, and click Open. In the New Image Overlay dialog box that appears, give a name to your raster overlay, and click OK. Because the raster dataset in georeferenced to a coordinate system, it is automatically placed in the appropriate location.
The land cover GeoTIFF has been imported into Google Earth and is located in the Places panel. If your imported image is larger than the maximum size supported by the hardware, you will be given several choices:.
Click to import large images and have them automatically split into tiles and scaled according to your zoom level. Click Scale to rescale to the maximum size supported. Click Crop to view only a full resolution subset of the image.
In addition to importing GIS data into Google Earth Pro, you can also use many other tools and software programs to convert GIS data to KML files for use in Google Earth. GIS software, like ESRI ArcGIS and MapInfo, have tools to export GIS data into KML format for use in Google Earth., a free utility that converts many formats, including shapefiles to KML., a free utility that converts shapefiles to KML. MapWindow GIS has, a tool for converting GIS data to KML. ESRI ArcGIS contains tools in the ArcToolbox (Conversion Tools To KML) for converting vector and raster GIS data to KML. is an extension for ArcGIS that converts GIS data to KML.
The is a free tool that has lower limits than the full version. MapInfo Professional has a. Discussion & feedback Have questions about this tutorial? Want to give us some feedback?
Visit the to discuss it with others.
I'm working on some software that displays a map, like this:!enter image description here1 I also have some export functions which exports the about image as.bmp/.Tiff/.Jpg/.PNG/.Wmf/.SVG This is.TIFF export:!enter image description here2 Now I also have to export it as GeoTiff. The software I am working on is in Delphi 7. Information I have come across this, but since I am new to GeoTIFF, I am stuck after the first point. Question Is it possible to convert the.TIFF file to.geotiff?
What I have tried but I can't figure out how to create the meta data for the tiff to create the GeoTIFF. There is a little bit of information which might help you in your task. First you may need to download inorder to use geotifcp and listgeo.
Create a TIFF File(You already did it.) Let us call it initialtif.tif find the image width and height(from where you saved it). ImageWidth = 1016 imageHeight = 551 Create a World File for our initialtif.tif using the below parameters.
From Wiki, the World File is defined as below. Refer below image for details. MapWidth and mapHeight are to be measured from your map application.
Line 1: A: pixel size in the x-direction in map units/pixel = mapWidth/imageWidth Line 2: D: rotation about y-axis = 0 Line 3: B: rotation about x-axis = 0 Line 4: E: pixel size in the y-direction in map units, almost always negative3 = -mapHeight/imageHeight Line 5: C: x-coordinate of the center of the upper left pixel = C Line 6: F: y-coordinate of the center of the upper left pixel = F Enter these 6 numbers on a text file and save as initialtif.tfw Get a GeoTiff(say reference.tif) in the same Coordinate System/projection. Get one from your friends or create it yourself using Qgis/Arcgis. Extract metadata from GeoTiff using listgeo command(In Windows.) listgeo -proj4 reference.tif metadata.txt Create GeoTiff using geotifcp command geotifcp -g metadata.txt -e forWorld.TFwx forWorld.TIF finaltiff.tif. The world file is VERY simple and this is most of the meta data you need to convert your.tif to a geotif. While we're on the subject, in most GIS applications, if you have a world-file, you don't need to convert to geotiff or JP2000 or any other format where the geotocation information is embedded. The GIS will look for and read the world file.
A world file has a similar extension as the image format except the last letter is a 'w'. So the world file for a tiff is '.tfw', for a '.bmp' it is '.bpw', for a '.jpg' it is '.jpw' and so on. A good description of the world-file can be found. From that and the image dimensions, you should be able to write your own world file by hand.
For example, below is a world file for a random tiff off my hard-drive. In my case the units are meters.
The bits in brackes are my annotations: 2.50 (pixel size in the x-direction in map units) 0.00 (rotation about y-axis) 0.00 (rotation about y-axis) -2.50 (pixel size in the y-direction in map units) 450001.250 (x-coordinate of the center of the upper left pixel) 1209998.750 (y-coordinate of the center of the upper left pixel) That's it! Alternatively you could make a geotiff in one step using GDAL (see ). You effectively are pluging in all this information into the command-line parameters plus you can set the out-going projection too. This would be my preference to the four-step process described in the link. You will note from the documentation that 'geotiff' is the default output format, so you don't even have to specify it!
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