Senin, 22 September 2008

Extensions for ArcGIS

Ketika googling dengan keyword ArcGIS, ku tertarik dengan ekstensi-ekstensi untuk ArcGIS yang dikeluarkan oleh Leica Geosystem dan Definiens...Leica dengan "Leica Geosystems Geospatial Imaging : Image Analysis for ArcGIS" dan Definiens dengan "Definiens Extension for ArcGIS®"
-----------------------------------------------------------------------------------
Image Analysis for ArcGIS

Image Analysis™ for ArcGIS is the GIS professional's all-in-one solution for preparing GIS-ready imagery, creating GIS-ready imagery from airborne sensors, extracting information from imagery and analyzing imagery for the derivation of spatial and non-spatial information. Image Analysis for ArcGIS enables you to extract up-to-date information from imagery directly into a geodatabase.

Image Analysis for ArcGIS saves you time when collecting reliable geographic content for your GIS as compared to other collection methods.

By working directly with your data in a geodatabase, you can help avoid the corruption of data that often occurs with multiple-step processes. In addition, this intuitive software is easy to learn and use.

Image Analysis for ArcGIS requires a corresponding license to your current version of ArcGIS.

Features:

* Single frame orthorectification
* Orthorectify frame camera, SPOT, Landsat, IKONOS and QuickBird imagery, as well as imagery with RPC information
* Create oriented images for use with Stereo Analyst® for ArcGIS
* Color balancing and mosaicking
* Supervised land cover classification
* Unsupervised classification
* Change detection
* Normalized Differential Vegetation Index (NDVI)
* Reprojection
* Import imagery from a variety of formats
* Raster to vector conversion and vice-versa
* Accessibility to Image Analysis' functions in ESRI's ArcToolbox

source : http://gi.leica-geosystems.com/LGISub1x41x0.aspx

-----------------------------------------------------------------------------------

Definiens Extension for ArcGIS®

Currently, most GIS applications cannot exploit all of the information within images. Extracting the information and fusing it with geospatial information is simply too difficult and time consuming. Conventional automated image analysis applications are restricted to simple feature extraction across a limited range of images. Any higher level interpretation requires remote sensing experts, a step which is time consuming, costly and prone to error. Standardization is almost impossible. Furthermore, information generally flows in one direction only – from image to GIS. It is impossible to optimize geospatial applications by using multiple iterations between image interpretation and GIS analysis.

The Definiens Extension for ArcGIS® provides a highly efficient work environment. It connects to the ArcGIS® Desktop products ArcView®, ArcInfo® and ArcEditor™ and extends the functionality of ArcCatalog™ and ArcMap™ by automated image intelligence applications, including feature extraction, change detection and object recognition from any kind of remote sensing images.

* Automated image intelligence applications in ArcGIS®
ArcCatalog™ organizes and manages all GIS information such as maps, globes, models, metadata, and services. A map is comprised of datasets, which can be raster images, raster thematic and vector thematic layers. The Definiens Extension for ArcGIS® allows ArcCatalog™ to define a collection of maps as a Definiens’ workspace. Each workspace entry represents a map which can be analyzed with Definiens’ applications. The image analysis can be executed on servers in batch mode for high throughput or on the user’s workstation to accelerate semi-automated analysis of individual images.
* Efficient post-processing
ArcMap™ is the central application in ArcGIS® Desktop for all map-based tasks including cartography, map analysis, and editing. The Definiens Extension for ArcGIS® enables users to review and edit Definiens’ workspace entries using all editing tools of the ArcGIS® Desktop environment. To accelerate the editing process and to enable highly accurate delineation, the workspace entries can be opened with Definiens Architect which contains specific modules to optimize the presentation of information extraction results for object-based editing.

With Definiens Extension for ArcGIS®, geospatial applications can be developed which exploit the wealth of information in remotely sensed imagery. More accurate and detailed maps can be rapidly produced, presenting information in a standardized and cost efficient way.

source : http://www.definiens.com/definiens-extension-for-arcgis_116_7_9.html

------------------------------------------------------------------------------------

nice to share :)

Aji PP

Data, Atribut, Spasial, Citra, GIS

Assalamu'alaikum...

Selamat Malam teman2.Lama ku tak bercuap2 via blog,,,

Sehari-hari kini kubertemu dengan data atribut (dalam bentuk exel, baris dan kolom)..
ku bertemu dengan data spasial biasany saat sebelum jam 12 dan sesudah setengah 2siang, yang berupa data lapangan menggunakan GPS yang kudownload menggunakan software ArcGIS dibantu dengan DNRGarmin.
di kala-kala lain, ku juga bermain dengan data spasial, di saat dibutuhkan untuk pembuatan peta sebagai panduan bagi tim yang ke lapangan.
Kadang kurindukan, kala-kala berotak-atik penuh dengan sofware-software GIS dan Remote Sensing (software pengolahan citra digital, misal ENVI, ErMapper, bahkan dulu sangat hoby bergonta-ganti OS hanya demi bermain dengan SeaDAS untuk selesaikan skripsi).
Dulu kujuga sempat bermain dengan software ModisTool yang digunakan untuk pemotongan atau subset data MODIS dan georeferencing atau koreksi geometrik atau registrasi koordinat dari data MODIS. Kala itu data MODIS yang digunakan ialah bukan MODIS level 1, tetapi LST MODIS (Land Surface Temperature) dari MODIS. Data tersebut berformat HDF, sehingga dengan menggunakan HDF Explorer dapat dibaca informasinya, bahwa data tersebut setelah dipotong sesuai area kajian dan berkoordinat, perlu di-rescale nilai digitalnya, sehingga akan diperoleh suhu permukaan daratan dalam derajat kelvin kemudian bisa juga kita konversi ke celcius.
ModisTool yang kupergunakan di atas, berbeda dengan ModisTool tambahan yang dapat di-add di ENVI yang fungsinya bisa untuk koreksi bow-tie, dan ekstraksi suhu dari data MODIS level 1B.
Dulu,,,ku senang sekali mengkombinasikan software-software yang ada...dari SeaDAS, erMapper, ENVI, ArcView, ArcGIS...semua ku-trial and succes...tuk meraih sesuatu yang diinginkan dengan cara yang efektif dan efisien...hehe
Kujuga senang bermain dengan HEGTools yang bisa digunakan untuk meng-koordinatkan data MODIS dan mengconvertnya ke dalam format TIFF. format TIFF tersebut memudahkan untuk dibaca di software ILWIS 3.4. Meskipun selain HEGTools, ada software-software lain yang bisa digunakan untuk conversi data HDF MODIS ke dalam format yang bisa dibaca oleh ILWIS.
Kemarin-kemarin saat melihat software ArcGIS 9.3 yang bisa diinstal langsung di Windows Vista, tanpa melalui tahapan2.. :)
Tertegun sejenak, karna ada tools2 tambahan..salah satunya model builder yang muncul di permukaan..saat di-klik..wach,,,sama seperti model builder di arcview (khan sama2 esri)...
Saya yakin banyak sudah teman2 yang menggunakan ArcGIS, karna meskipun mahal..tetapi "mudah" didapat,,,sehingga membuat kita semakin mudah tuk dapat belajar dan belajar.,.
Kini kumasih dikit berkecimpung dengan GIS terutama di bidang Mapping nya--alias membuat peta2..
untuk Modelling...udah lama tidak bersentuhan (overlap alias tumpangtindih)...untuk Measurement...ya paling mengukur jarak dari mana mau kemana, atau berapa luas area tertentu,,M...satunya lagi apa ya??wach lupa juga nie,,,hehe
Hari ini,,,tadi seharin bermain dengan sebuah sofware Bussines Process Modelling...ternyata tidak jauh beda dengan Pemodelan di GIS,,,atau penyusunan ataupun perancangan basisdata dalam GIS,,,disitu dikupas begitu detailnya secara atributal..dimana ada Models ada object ada relationship ada informasi atribut atau metadata/metafile yang kesemuanya berada dalam DATABASE..bedanya dengan DATABASE di GIS ialah bahwa database pelatihan yang kuikuti tersebut tidak berbasis kebumian...
Yang membuatku tertarik juga,,bahwa dalam presentasinya..memberikan gambaran tentang cakupan GLOBAL, LEvel2 databasenya..Trainer menggunakan perumpamaan dengan peta-peta, dari peta skala BENUA, peta Negara, peta Region, Peta Kota...untuk yang paling detilnya,,,
kutuliskan ke dalam DATA, ATRIBUT, SPASIAL, CITRA, GIS...karna itulah yang kutemui saat-saat ini...
DATA yang berlembar-lembar hingga puluhan ribu bahkan mungkin lebih...yang berupa tabular jika digitalkan hingga nampak begitu ATRIBUTal..dan nampak susah jika ingin di-SPASIALkan secara individual...meskipun sudah menggunakan CITRA untuk dapat melihat individual bangunan, hanya bisa di-agregat ke dalam skala region terkecil di Indonesia yaitu level kelurahan..sehingga akan tersaji indah dengan memanfaatkn GIS software.

sekiranya,,begitulah pernak-pernik,,tulisan yang tak berarah tetapi mempunyai tujuan...

Wassalamu'alaikum..

Salam hangat,

Aji PP
-di benak saat ini ada berjuta data,atribut, spasial,citra,gis-

Rabu, 10 September 2008

Download citra MODIS

Citra MODIS merupakan salah satu citra yang dapat diperoleh secara mudah dan gratis. Download citra ini cukup beribet menurut saya sebab ada tahap-tahap yang harus dilewati :)...
sekedar sharing langkah-langkah untuk dapetin citra MODIS...

1. Buka alamat http://ladsweb.nascom.nasa.gov/ di internet2. Pilihlah Data http://ladsweb.nascom.nasa.gov/data/

3. Pilihlah Search http://ladsweb.nascom.nasa.gov/data/search.html selanjutnya klik level 1
and atmosphere data products.
4. Pilihlah citra yang diinginkan, misalnya citra Aqua MODIS. Selanjutnya memilih products
Aqua MODIS yang mau didownload, misal MYD01KM (resolusi 1 km).
5. Tentukan tanggal perekaman citra yang diinginkan
6. Tentukan lokasi penelitian berdasarkan Lat long
7. Lalu klik Search
8. Lalu akan muncul hasilnya
9. Dapat melihat preview (klik + View RGB) citra sebelum order citra atau langsung order dengan mencentang pada Add untuk citra yang diinginkan kemudian klik Order Files Now
10. Akan muncul kotak dialog, kemudian masukkan alamat email anda dan pilih metode pengiriman data dengan FTP Pull, setelah itu klik order.
11. Selang beberapa hari kemudian, anda akan menerima email bahwa order citra anda sudah diterima
12. Sehari kemudian anda akan menerima email notifikasi yang berisi alamat download data via ftp. Download citra dibatasi waktunya yaitu 7 hari, sehingga secepatnya mendownload citra sebelum terhapus.
13. Untuk download citra pertama masuk ke website ladsweb http://ladsweb.nascom.nasa.gov/, kemudian klik Data, selanjutnya klik FTP site.
14. Akan muncul kotak dialog seperti dibawah ini, selanjutnya klik browse
15. Kemudian pilih orders, lalu memilih ID folder file citra yang akan di download.
16. Setelah itu proses download file citra dapat dilakukan.


Untuk langkah dengan disertai gambar agar lebih jelas dapat didownload :
http://www.esnips.com/doc/fc276e59-52b5-45dc-96c3-5dd9dced5f79/Langkah-Order-Citra-MODIS

thanks 4 attention...


_nugie_

MODIS TOOLS

MODIS (or Moderate Resolution Imaging Spectroradiometer) is a key instrument aboard the Terra (EOS AM) and Aqua (EOS PM) satellites. Terra's orbit around the Earth is timed so that it passes from north to south across the equator in the morning, while Aqua passes south to north over the equator in the afternoon. Terra MODIS and Aqua MODIS are viewing the entire Earth's surface every 1 to 2 days, acquiring data in 36 spectral bands, or groups of wavelengths (see MODIS Technical Specifications). These data will improve our understanding of global dynamics and processes occurring on the land, in the oceans, and in the lower atmosphere. MODIS is playing a vital role in the development of validated, global, interactive Earth system models able to predict global change accurately enough to assist policy makers in making sound decisions concerning the protection of our environment.

Terra
Terra is a multi-national, multi-disciplinary mission involving partnerships with the aerospace agencies of Canada and Japan. Managed by NASA’s Goddard Space Flight Center, the mission also receives key contributions from the Jet Propulsion Laboratory and Langley Research Center. Terra is an important part of NASA’s Science Mission, helping us better understand and protect our home planet.

Aqua, Latin for water, is a NASA Earth Science satellite mission named for the large amount of information that the mission will be collecting about the Earth's water cycle, including evaporation from the oceans, water vapor in the atmosphere, clouds, precipitation, soil moisture, sea ice, land ice, and snow cover on the land and ice. Additional variables also being measured by Aqua include radiative energy fluxes, aerosols, vegetation cover on the land, phytoplankton and dissolved organic matter in the oceans, and air, land, and water temperatures.

The Aqua mission is a part of the NASA-centered international Earth Observing System (EOS). Aqua was formerly named EOS PM, signifying its afternoon equatorial crossing time. A timeline of Aqua on-orbit progress through the initial 120 day check-out period can be found here.

Aqua was launched on May 4, 2002, and has six Earth-observing instruments on board, collecting a variety of global data sets. Aqua was the first member launched of a group of satellites termed the Afternoon Constellation, or sometimes the A-Train. The second member to be launched was Aura, in July 2004, the third member was PARASOL, in December 2004, and the fourth and fifth members are CloudSat and CALIPSO, in May 2006. Expected upcoming missions are OCO and Glory, with the placement of Glory not yet determined. Once completed, the A-Train will be led by OCO, followed by Aqua, then CloudSat, CALIPSO, PARASOL, and, in the rear, Aura.

The MODIS instrument is operating on both the Terra and Aqua spacecraft. It has a viewing swath width of 2,330 km and views the entire surface of the Earth every one to two days. Its detectors measure 36 spectral bands between 0.405 and 14.385 ┬Ám, and it acquires data at three spatial resolutions -- 250m, 500m, and 1,000m.

Along with all the data from other instruments on board the Terra spacecraft and Aqua Spacecraft, MODIS data are transferred to ground stations in White Sands, New Mexico, via the Tracking and Data Relay Satellite System (TDRSS). The data are then sent to the EOS Data and Operations System (EDOS) at the Goddard Space Flight Center. The Level 1A, Level 1B, geolocation and cloud mask products and the Higher-level MODIS land and atmosphere products are produced by the MODIS Adaptive Processing System (MODAPS), and then are parceled out among three DAACs for distribution. Ocean color products are produced by the Ocean Color Data Processing System (OCDPS) and distributed to the science and applications community.

The many data products derived from MODIS observations describe features of the land, oceans and the atmosphere that can be used for studies of processes and trends on local to global scales. As just noted, MODIS products are available from several sources. MODIS Level 1 and atmosphere products are available through the the LAADS web. Land Products are available through the Land Processes DAAC at the U. S. Geological Survey EROS Data Center (EDC). Cryosphere data products (snow and sea ice cover) are available from the National Snow and Ice Data Center (NSIDC) in Boulder, Colorado. Ocean color products and sea surface temperature products along with information about these products are obtainable at the OCDPS at GSFC. Users with an appropriate x-band receiving system may capture regional data directly from the spacecraft using the MODIS Direct Broadcast signal.

MODIS data in HDF-EOS format (Hierarchical Data Format - Earth Observing System). Hierarchical Data Format (HDF) is the standard data format for all NASA Earth Observing System (EOS) data products. HDF is a multi-object file format developed by The HDF Group.

MODIS Tools is helping us to read, extract or subset, convert HDF-EOS data.

1. MODIS Reprojection Tool (MRT)- http://edcdaac.usgs.gov/landdaac/tools/modis/index.asp

a software tool for reading data files in HDF-EOS format, specify a geographic subset or band subset as input to processing, perform geographic transformation to a different coordinate system/cartographic projection, write the output to file formats other than HDF-EOS

Platforms : Unix (Sun, SGI), Windows (9x, 2000, NT, XP), and Linux

2. QA Tools - http://edcdaac.usgs.gov/landdaac/tools/ldope/index.asp

provides links to QA tools developed for science team and user community
Platforms : Unix

3. HDF Tools (http://hdf.ncsa.uiuc.edu/)

The NCSA HDF Home Page - contains links to an array of HDF support tools and information
Platforms : specific to tool selected


4. HDF-EOS Web-Based Subsetter (HEW) - http://subset.itsc.uah.edu/hew2k/hew.html

can extract a subset of any grid or swath data file that is in HDF-EOS format Platforms : independent

5. MODIS Swath-to-Grid Toolbox - http://nsidc.org/data/modis/ms2gt/

a set of software tools that reads HDF-EOS files containing MODIS swath data and produces flat binary files containing gridded data in a variety of map projections Platforms : Unix, with a standard C compiler, also requires Perl 5.0 or higher and IDL 5.0 or higher

6. HDF-EOS to GeoTIFF converter (HEG) - http://edcdaac.usgs.gov/landdaac/tools/heg/heg_announce.asp

converts many EOS products written in HDF-EOS to GeoTIFF, native binary or HDF-EOS Grid, also has re-projection, resampling, subsetting, stitching (mosaicing), and metadata creation capabilities
Platforms : Linux , Macintosh , SGI , Sun, Windows

7. MODIS Land Tile Calculator - http://landweb.nascom.nasa.gov/cgi-bin/developer/tilemap.cgi

converts latitude/longitude decimal degrees to MODIS Tile grid and Line/Sample coordinates and vice-versa
Platforms: online tool

source informations :
- http://modis.gsfc.nasa.gov/
- http://modis-land.gsfc.nasa.gov/tools.htm
- http://nsidc.org/data/hdfeos/

Jumat, 05 September 2008

SeaWIFS kembali mengamati bumi

Setelah lama tidak melihat situsnya Oceancolor homepage, kemarin sore ku buka,mata langsung tertuju dengan sebuah kata yakni SeaWIFS yang kembali memonitor rumah kita (bumi)...waow...
Satelit SeaWIFS telah kembali beroperasi normal kembali dan ini sungguh kabar yang sangat menggembirakan bagi masyarakat penginderaan jauh pada umumnya dan terutama yang senang mengamati bumi :).


gambar di atas adalah satelit SeaWIFS

SeaWiFS stands for Sea-viewing Wide Field-of-view Sensor. It is the only scientific instrument on GeoEye's OrbView-2 (AKA SeaStar) satellite, and was a follow-on experiment to the Coastal Zone Color Scanner on Nimbus 7. Launched August 1, 1997 on an Orbital Sciences Pegasus small air-launched rocket, the instrument began scientific operations on 18 September 1997. The sensor resolution is 1.1 km (LAC), 4.5 km (GAC). The sensor records information in the following optical bands:
Band Wavelength
1 402-422 nm
2 433-453 nm
3 480-500 nm
4 500-520 nm
5 545-565 nm
6 660-680 nm
7 745-785 nm
8 845-885 nm

The instrument has been specifically designed to monitor ocean characteristics such as chlorophyll-a concentration and water clarity. The instrument is able to tilt up to 20 degrees to avoid sunlight from the sea surface. This feature is important at equatorial latitudes where glint from sunlight often obscures water colour.

sumber : http://en.wikipedia.org/wiki/SeaWiFS

Berikut sebuah tulisan dari situs oceancolor mengenai kembalinya SeaWIFS :

SeaWiFS Returns to Monitoring Our Home




We are so happy to report that after many months of hard work on the part of the folks at GeoEye, Orbital Sciences and NASA, SeaWiFS has been returned to normal operations as of yesterday, and, from what we have been able to tell so far from the imagery and telemetry, all systems are performing as they should and hopefully, this will be the resumption of a long and incredibly valuable data set. Thanks to everyone involved for their efforts on getting us back.

The above image shows Tropical Storm Fay and the eastern U.S. on August 20, 2008 while a more global perspective shows what other regions looked like on the same day.


untuk melihat-lihat gambar-gambar hasil rekaman satelit yang ada di situs oceancolor : Image Gallery

Rabu, 03 September 2008

modis noaa badai gustav



Gambar di atas merupakan rekaman dari citra satelit Aqua MODIS yang diperoleh 09/01/2008 dalam tampilan True Color Composite RGB 1,4,3.



September 3, 2008 - Hurricane Gustav
Hurricane Gustav Image used for Spacing Purposes
Satellite: Aqua
Date Acquired: 09/01/2008
Resolutions: 1km (477.9 KB)
500m (1.5 MB)
250m (4.6 MB)
Bands Used: 1,4,3
Credit: Jeff Schmaltz
MODIS Land Rapid Response Team,
NASA GSFC

On August 25, the National Hurricane Center issued its first public advisory on the storm system that would eventually become Hurricane Gustav. Gustav was the seventh named storm of the 2008 Atlantic hurricane season, and the first major (Category 3 or higher) storm to threaten the mainland United States. Since its formation in the Caribbean Sea, it has battered Haiti, Jamaica, and Cuba on its west-northwest path toward the Gulf of Mexico. On September 1, 2008, Gustav made landfall on the Gulf Coast in central Louisiana as a Category 2 storm.

This image of Gustav making landfall was captured by the MODIS on the Aqua satellite on September 1 at 2:00 p.m. Central Daylight Time (19:00 UTC). The storm’s eye was indistinct but still detectable just north of Vermilion Bay, located in middle of the Louisiana coastline. The storm was large, but it was losing the well-defined spiraling structure of a powerful storm. As of late Monday afternoon, the forecast showed that a weakening Gustav would continue its northwestward path into Texas through Wednesday afternoon before bending back, clipping the corner of Oklahoma, and heading into Arkansas.

(sumber :http://modis.gsfc.nasa.gov/)

Dalam kompas.com Selasa, 2 September 2008 | 02:09 WIB

ditampilkan citra NOAA yang memperlihatkan badai Gustav


NEW ORLEANS, SENIN - Badai Gustav akhirnya mulai menyerang daratan AS, masuk dari Cocodrie, 130 kilometer bagian barat daya New Orleans, Lousiana pukul 9.30 waktu setempat. Meski kekuatannya dilaporkan menurun, hanya 2 dari skala 1-5, badai tersebut menyebabkan gelombang tinggi yang memicu banjir dan putusnya jaringan listrik di seluruh kota tersebut.
.............
Badai Gustav diperkirakan akan terus bergerak ke arah barat laut sampai Sabtu (6/9). Setelah menerjang New Orleans, badai diperkirakan berangsur melemah melewati wilayah selatan Lousiana hingga Dallas, Texas.
..........
sumber : kompas.com