Geology of Malvan
Transcript of Geology of Malvan
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Roll No. 115
UId No. 120830
Pre-Field Report
S.GEO.5.04
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The details of the map downloaded from earth explorer:
Data set attribute Attribute value
Landsat Scene Identifier: LC81470492013348LGN00
WRS Path: 147WRS Row: 049
Full or Partial Scene: FULL
Day/Night: DAY
Sensor Identifier: OLI_TIRS
Date Acquired: 2013/12/14
Image Quality: 9
Scene Cloud Cover: 0
Sun Elevation: 45.03773227
Sun Azimuth: 149.66599333
Center Latitude: 1554'02.81"NCenter Longitude: 7315'38.99"E
NW Corner Lat: 1656'51.54"N
NW Corner Long: 7234'57.18"E
NE Corner Lat: 1635'03.08"N
NE Corner Long: 7419'36.62"E
SE Corner Lat: 1450'37.64"N
SE Corner Long: 7355'47.17"E
SW Corner Lat: 1512'34.02"N
SW Corner Long: 7212'02.77"E
https://lta.cr.usgs.gov/landsat_dictionary.html#entity_idhttps://lta.cr.usgs.gov/landsat_dictionary.html#wrs_pathhttps://lta.cr.usgs.gov/landsat_dictionary.html#wrs_rowhttps://lta.cr.usgs.gov/landsat_dictionary.html#full_partial_scenehttps://lta.cr.usgs.gov/landsat_dictionary.html#day_or_nighthttps://lta.cr.usgs.gov/landsat_dictionary.html#sensor_idhttps://lta.cr.usgs.gov/landsat_dictionary.html#acquisition_datehttps://lta.cr.usgs.gov/landsat_dictionary.html#image_quality_landsat_8https://lta.cr.usgs.gov/landsat_dictionary.html#cloud_coverhttps://lta.cr.usgs.gov/landsat_dictionary.html#sun_elevationhttps://lta.cr.usgs.gov/landsat_dictionary.html#sun_azimuthhttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#coordinates_degreeshttps://lta.cr.usgs.gov/landsat_dictionary.html#sun_azimuthhttps://lta.cr.usgs.gov/landsat_dictionary.html#sun_elevationhttps://lta.cr.usgs.gov/landsat_dictionary.html#cloud_coverhttps://lta.cr.usgs.gov/landsat_dictionary.html#image_quality_landsat_8https://lta.cr.usgs.gov/landsat_dictionary.html#acquisition_datehttps://lta.cr.usgs.gov/landsat_dictionary.html#sensor_idhttps://lta.cr.usgs.gov/landsat_dictionary.html#day_or_nighthttps://lta.cr.usgs.gov/landsat_dictionary.html#full_partial_scenehttps://lta.cr.usgs.gov/landsat_dictionary.html#wrs_rowhttps://lta.cr.usgs.gov/landsat_dictionary.html#wrs_pathhttps://lta.cr.usgs.gov/landsat_dictionary.html#entity_id -
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1) To download the TIFF data product of the area of Malvan and surrounding area i.e.
of path 147 and row 049.
First open the site http://earthexplorer.usgs.gov/,login or create an account for this site. Then
type in Malvan and input the dates between which you want the maps and also the months.
You get the co-ordinates of Malvan which is seen in the map below(as 1.).
http://earthexplorer.usgs.gov/http://earthexplorer.usgs.gov/http://earthexplorer.usgs.gov/ -
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Go to data sets, select Landsat Archive, further select L8 OLI/TIRS and then search
for results.
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In results, select the map you wish to download by clicking on the download button.
Download the Level 1 GeoTIFF Data Product.
After saving the image, unzip the file.
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2) To get the true colour composite(TCC) and False colour compositee(FCC), I have
used the application MultiSpecW32. Select open image. Open as a Multispectral type
and select all the pictures that have been extracted earlier. Link the selected files to
new image window.
Select the Channels for Red, blue and green colour. Depending on the channels
chosen you may get a FCC of the image, a TCC of the image or some other colour
composite.
Finally select the area in the map which you want and save that image. Hence, you
can only use the part of the map which you need.
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3) To georeference the image Page-1, I used QGIS(Quantum GIS version 2.4).
Select raster, then georeference and georeference again.
It opens the plugin window, which is divided into two parts. The top section where
your raster will be displayed and the bottom section where a table showing your GCPs
will appear.
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To open the image go to file, open raster, browse and open image Page-1.
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You will be asked to choose the rasters co-ordinate refrence system(CRS). This is to
specify the projection and datum of your control points. I have chosen the Everest
1830 datum.
The image will be loaded on the top section.
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Use the zoom buttons to learn more about the map. Click the add point button to add
co-ordinates.
Select a point on the map and state its co-ordinates. You can either enter the
co-ordinates in Degree, Minutes, Seconds(DMS) or Degree Decimal(DD) manner. I
had entered in DD manner.
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Since the above map doesnt have co-ordinate grid with markings, I have opened the
TCC of the image done earlier in MultiSpecW32, selected points which are easily
visible on both maps and then given the co-ordinates.
I have inputed four points. But the more points you input, the more accurate the
georeferencing will be.
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To start georeferencing go to file and then click on start georeferencing.
The transformation settings opens. Input in the Transformation type as Thin Plate
Spline and Target SRS as EPSG::4326 as it is a widely compatible datum. choose thedestination where you want to store it in output raster and then click OK.
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You will now see the georefrenced layer loaded in QGIS.
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References and applications used:
1)http://www.qgistutorials.com/en/docs/georeferencing_basics.html
2)http://earthexplorer.usgs.gov/
3) MultiSpec Application Version 3.4 (32-bit version).
4) QGIS (Quantum GIS) version 2.4.0-Chugaik (32-bit version).
http://www.qgistutorials.com/en/docs/georeferencing_basics.htmlhttp://www.qgistutorials.com/en/docs/georeferencing_basics.htmlhttp://www.qgistutorials.com/en/docs/georeferencing_basics.htmlhttp://earthexplorer.usgs.gov/http://earthexplorer.usgs.gov/http://earthexplorer.usgs.gov/http://earthexplorer.usgs.gov/http://www.qgistutorials.com/en/docs/georeferencing_basics.html