Saturday, August 4, 2012

Mosaic Image Finder for ArcGIS 10

The Mosaic Image Finder is a new add-in for ArcMap (ArcGIS 10) to explore imagery within a mosaic. The add-in supports mosaics stored locally in a geodatabase (or SDE connection) or published to ArcGIS Server as an image service.



To install:
1) Download this contribution to your computer,
2) Unzip the file,
3) Double click on the .esriAddIn file.

To uninstall:
1) In ArcMap, select Customize > AddIn Manager,
2) Select "Mosaic Image Finder",
3) Click "Delete this AddIn".

How to start:
1) Start ArcMap,
2) Display the Mosaic Image Finder toolbar
(Customize > Toolbars > Mosaic Image Finder).
3) Click the (only) button on the toolbar.
(this will display the Mosaic Image Finder window)
4) Add a mosaic dataset (or mosaic image service) to your map document
5) Zoom to an area of interest
6) Drop a mosaic layer from the ArcMap TOC and drop it into the Mosaic Image Finder window.
7) When images have finished loading, sort by different fields or toggle the ascending/descending buttons.
8) To add a single image to ArcMap, click on an image in the 3D display so that it is highlighted in red. Click the add button to add a cloned mosaic layer with only the selected image shown.



for more : http://resources.arcgis.com/gallery/file/arcobjects-net-api/details?entryID=7B5EEB2D-1422-2418-7F3D-CBB6F8F56C7C 

Thursday, August 2, 2012

CARA MENGISI GAP (GAP FILL) LANDSAT 7 (SLC-OFF)


Pada tanggal 31 Mei 2003 instrumen/sensor Scan Line Corrector (SLC) di ETM + mengalami kerusakan. Semua image yang diambil setelah tanggal tersebut memiliki celah/gap, sehingga ada data yang hilang sekitar 20%.

Salah satu cara untuk meminimilisasi gap tersebut adalah dengan mengisi gap citra landsat utama dengan citra landsat yang lain, yang memiliki bagian gap yang berbeda.

Untuk citra pengisinya, sebaiknya diambil citra pada tahun yang sama tapi bulan pemotretannya yang berbeda. Untuk cara mendapatkan citra landsat, bisa melihat pada tutorial disini.

Dengan bantuan software "Frame and Fill" dari envi, kita dapat mengisi Gap Landsat 7. Softwarenya silahkan download dari siniH.

Berikut langkah-langkahnya :

http://pecethea.blogspot.com/2011/03/cara-mengisi-gap-gap-fill-landsat-7-slc.html


Thursday, July 26, 2012

Download Free ASTER G DEM Version 2

In 2009, NASA along with the Ministry of Economy, Trade and Industry of Japan released the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM), a digital topographic map of the new earth that is claimed to be the most comprehensive coverage with almost 99% of all the earth's surface.


GDEM is processed using a stereo-correlating 1.3 million scene ASTER optical image archives. Including 83 degrees north latitude and 83 degrees south latitude, which means that nearly 99% of the earth's surface covered by the GDEM with a level of accuracy of 30 meters, beating the SRTM dataset which only cover 80% of the Earth's surface with a level of accuracy of 90 meters.

Now the ASTER Global DEM Version 2 has been available for download for free. With the addition of stereo-pair images 260.000 as an increase in the previous DEM data. You can download ASTER Global DEM Version 2 by Earth Remote Sensing Data Analysis Center (ERSDAC) of Japan and from the LP DAAC.




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