Estoy realizando un estudio multitemporal usando imágenes LANDSAT. desde los sitios que normalmente descargo imágenes (earthexplorer, reverb echo, earth data search) no encuentro todas las imágenes disponibles desde 1980 hasta 2010, sino solo algunas por año. Hay algún sitio, o algún modo en los sitios que visito frecuentemente para acceder a los archivos completos de las imágenes que necesito?
Emanuel, Dónde está ubicada su área de estudio? Déjame verificar si puedo encontrar datos para ti?
Hi Emanuel,
Sorry my answer is in English. The best source for Landsat imagery is earthexplorer. It could be that there is a limited number of images from 1980 till 2010. However, if you can tell me your images Path and Row I can check their database for any Landsat images.
Gordana, I hardly know spanish but I used google translate. I also offered to help search Landsat 4-5 TM and 7 ETM+ images for the particular time period (1980-2010). The only thing that we would need is the location of the study area or coordinates. Emanuel, are you there?
Gordana & James.
Thanks for answering.
The study area corresponds to the northwest of the province of La Rioja, in Argentina. Attached a kml file to identify the area of interest.
Emanuel, thanks for sharing the kmz file. Here is what I found.
- With Landsat 7 ETM+ there are 1152 scenes
- With Landsat 4-5 TM there are 2030 scenes
- And with Landsat 1-5 MSS there are 124 scenes
All together there are 3306 Landsat scenes covering different parts of your study area according to the kmz file that you shared for the time period Jan 1980 to Dec. 2010. Of course a single Landsat scene does not cover your study area entirely, for that you have to stitch different scenes to create a mosaic. Anyway, here are the steps I followed in Earthexplorer
I've also attached a screenshot of the 3rd and 4th steps. Let me know if you need any more help.
James,
I have a problem then
In my "results" tab, it only shows me the following available images:
- Landsat t ETM +: There are 100 scenes between December 2009 and December 2010.
- Landsat 4-5: There are 100 scenes between August 2009 and December 2010.
- Landsat 1-5 mss: There are 100 scenes between February 1985 and March 1987.
In all the mentioned cases, it only shows me 1 page of results (from 0 to 100 scenes).
This should not be a problem. Just go to your profile settings and under the 'Interface Options' change the 'Result Set Size' to a higher number. And you should be good to go. Also use the information icon (i) shown by the red arrow in the attached screenshot. This icon shows the total number of results returned for your specific search criteria. You may also want to look at the Bulk Download option.
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