Download SRTM Kontur

21 08 2010


Saya telah membuat sebuah mini tutorial dalam 6 halaman file PDF tentang cara melakukan download SRTM kontur via web USGS dan via Global Mapper Software. Tutorial ini saya buat untuk menjawab pertanyaan seseorang yang menanyakan cara download SRTM Contours ini melalui email saya.

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// Jika Anda ingin memproses kontur hasil download tersebut menjadi sebuah rendered TIN atau untuk analisa menggunakan 3D Analyst bisa membuka kembali postingan Konversi Data SRTM atau kumpulan Video Tutorial 3D Analyst Bagian 1, Bagian 2 dan Bagian 3.

Download Tutorial How To Download SRTM Contours

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Online Map

21 08 2010

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Konversi Kontur SHP Ke Layer 3D CAD

21 08 2010

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// Anggota milis  di RSGISForum menanyakan cara melakukan konversi layer  kontur dari  format ESRI shapefile (shp) menjadi  layer CAD dengan tetap ingin  mendapatkan nilai z nya atau elevasi dari kontur tersebut. Saya mencoba membuat mini tutorial untuk menjawab pertanyaan tersebut.

Cara pertama menggunakan ArcGIS plus extension 3D Analyst.  Layer kontur dalam format shp terlebih dahulu di konversi menjadi 3D menggunakan fasilitas yang tersedia di 3D Analyst. Kemudian hasilnya (default file name-nya dddfeat1.shp) di import dari AutoCAD (Map). Berikut adalah tahapan proses tersebut disertai dengan screenshot :

  1. 3D Analyst –> Convert Features to 3D
  2. Tentukan input features-nya, lalu tentukan source of heights . Nilai elevasi dari layer kontur format file shp terdapat di attribute, untuk itu pilih input feature attribute pilih nama field yang memiliki nilai elevasi tersebut. Secara default file name hasil konversi adalah dddfeat1.shp.
  3. File hasil konversi (dddfeat1.shp) selanjutnya di import di program CAD. Buka AutoCAD (Map), dari menu Map –> Tools –> Import
  4. Dari jendela Import yang terbuka, arahkan ke drive/folder tempat  file dddfeat1.shp disimpan. Pastikan  Files of type adalah ESRI Shape. Klik OK
  5. Lihat gambar diatas, klik pada tulisan <None> pada kolom Data. Anda akan mengisikan sumber nilai elevasi pada jendela yang terbuka seperti pada gambar dibawah ini. Pilih Create Object Data, lalu klik Select Fields.
  6. Pada jendela Object Data Mapping seperti gambar dibawah ini, pilih field yang akan digunakan sebagai input. Klik OK
  7. Zoom to Extent untuk melihat kontur hasil konversi. Untuk melihat nilai elevasi kontur, pilih salah satu garis kontur, lihat properties-nya (klik kanan).

Cara kedua, jauh lebih simple, dengan menggunakan software Global Mapper. Buka file kontur dalam format shp, kemudian dari menu File –> Export Vector Data–> Export DXF.

Dari jendela DXF Export Options yang terbuka, pastikan Anda mencentang pilihan ‘Create 3D Feature Using Loaded Elevation Data’. Klik OK, simpan dengan nama file yang Anda kehendaki.

Kini Anda sudah memiliki file 3D dengan format dxf yang bisa di buka di program AutoCAD.

Punya alternative lain cara melakukan konversi layer  kontur dari  format ESRI shapefile (shp) menjadi  layer CAD dengan tetap ingin  mendapatkan nilai z nya atau elevasi dari kontur? Silahkan berbagi ilmu dengan mengisi comment di bawah.





Rumus Untuk Konversi Latitude – Longitude ke UTM

21 08 2010

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// Postingan ini untuk menjawab beberapa pertanyaan, baik yang ada di milis RSGISForum maupun via komentar di blog GIS ini. Rumus untuk melakukan konversi dari Latitude – Longitude (Lintang & Bujur) ke sistem proyeksi UTM yang bisa Anda download ini merupakan tulisan dari Steven Dutch dari University of Wisconsin.

Perhatian! Tidak seperti lintang dan bujur, tidak ada kerangka acuan fisik untuk UTM grid. Latitude ditentukan oleh sumbu kutub bumi. Longitude ditentukan oleh rotasi bumi. Tidak ada cara untuk menentukan koordinat UTM Anda kecuali dengan perhitungan. Referensi dasar untuk mengubah koordinat UTM dan geografis adalah US Geological Survey Professional Paper 1395 dan US Army Technical Manual TM 5-241-8 dimana masing-masing memiliki kelebihan dan kekurangan.

Untuk untuk melakukan konversi dari Latitude – Longitude ke sistem proyeksi UTM, rumus dari US Army Technical Manual TM 5-241-8 tampak lebih baik dengan notasi yang lebih konsisten dan lebih jelas, rumus di tata sedemikian sehingga lebih mudah untuk debug pada pemrograman komputer.

Selengkapnya tentang rumus untuk melakukan konversi dari Latitude – Longitude ke sistem proyeksi UTM bisa Anda download melalui link di bawah ini :

Download Rumus Untuk Konversi Latitude – Longitude ke UTM





WHY MANGANESE BOOOOMMMMM???

3 08 2010
U.S.Geological Survey (USGS): Manganese
Statistics and Information: Manganese (Mn) is essential to iron and steel production by virtue of its sulfur-fixing, deoxidizing, and alloying properties. Steelmaking, including its ironmaking component, accounts for most domestic manganese demand, presently in the range of 85% to 90% of the total. Manganese ferroalloys, consisting of various grades of ferromanganese and silicomanganese, are used to provide most of this key ingredient to steelmaking. Products for construction, machinery, and transportation are leading end uses of manganese. Manganese also is a key component of certain widely used aluminum alloys and, in oxide form, dry cell batteries. As ore, additional quantities of manganese are used for such nonmetallurgical purposes as plant fertilizers, animal feed, and colorants for brick.

Manganese
(Data in thousand metric tons gross weight unless otherwise noted)
U.S. Domestic Production and Use: Manganese ore containing 35% or more manganese was not produced domestically in 2008. Manganese ore was consumed mainly by eight firms with plants principally in the East and Midwest. Most ore consumption was related to steel production, directly in pig iron manufacture and indirectly through upgrading ore to ferroalloys. Additional quantities of ore were used for such nonmetallurgical purposes as production of dry cell batteries, in plant fertilizers and animal feed, and as a brick colorant. Manganese ferroalloys were produced at two smelters, although one operated sporadically throughout the year. Construction, machinery, and transportation end uses accounted for about 29%, 10%, and 10%, respectively, of manganese demand. Most of the rest went to a variety of other iron and steel applications. The value of domestic consumption, estimated from foreign trade data, was about $3 billion.

U.S. Recycling: Manganese was recycled incidentally as a minor constituent of ferrous and nonferrous scrap; however, scrap recovery specifically for manganese was negligible. Manganese is recovered along with iron from steel slag.

U.S. Import Sources (2004-07): Manganese ore: Gabon, 61%; South Africa, 18%; Australia, 8%; China, 3%; and other, 10%. Ferromanganese: South Africa, 53%; China, 18%; Republic of Korea, 6%; Mexico, 6%, and other, 17%. Manganese contained in all manganese imports: South Africa, 34%; Gabon, 21%; China, 9%; Australia, 7%; and other, 29%.

U.S. Tariff:

Item Number Normal trade relations 12/31/2008
Manganese dioxide 2820.10.0000 4.7% ad val.
High-carbon ferromanganese 7202.11.5000 1.5% ad val.
Silicomanganese 7202.30..0000 3.9% ad val.
Metal, unwrought 8111.00.4700/4900 14% ad val.

U.S. Depletion Allowance: 22% (Domestic), 14% (Foreign).

U.S. Government Stockpile: The uncommitted inventory of metallurgical ore was no longer differentiated between stockpile and nonstockpile grades.

Stockpile Status- 09/30/2007
Material Uncommitted Inventory Authorized For Disposal Disposal Plan FY 2008 Disposals FY 2008
Manganese ore:
Battery grade —- —- 18 16
Metallurgical grade 3 3 227 —-
Ferromanganese, high-carbon 477 477 91 77
Synthetic dioxide —- —- 3 1

Events, Trends, and Issues: Apparent consumption in 2008 was slightly lower than that of 2007 owing to moderate demand by the U.S. domestic steel industry, as reflected in lower manganese imports (content basis) and a reduction in producer and consumer stock releases. Through September 2008, U.S. domestic steel production was 4% higher than that of the same period in 2007. By the end of October 2008, the U.S. weekly average spot price for high-carbon ferromanganese was double that at the start of the year, and medium-carbon ferromanganese and silicomanganese weekly average spot prices were more than 30% higher over the same period. The annual average U.S. domestic manganese ore contract price followed the 314% to 413% increase in the international price for metallurgical-grade ore set between Japanese consumers and major suppliers in February 2008. The average weekly spot market price for 48% manganese ore, CNF China, had increased by 35% to $15.92 per metric ton unit through October 2008, owing to increased global demand for manganese ore, particularly in China and India. However, U.S. spot market prices for manganese ferroalloys and Chinese spot market prices for 48% manganese ore declined in October because of decreasing demand caused by global financial problems that began during the third quarter of 2008.

World Mine Production, Reserves, and Reserve Base (metal content): Reserve and reserve base estimates have been revised from those previously published for Gabon (reserves, upward; reserve base, downward), Mexico (reserve base, downward), and South Africa (reserves, downward), as reported by the major manganese producers in Gabon, Mexico, and South Africa. Reserves are based on estimates of demonstrated resources.

Mine Production Reserves Reserve Base
2007 2008 (e)
United States —- —- —-
Australia 2,540 2,200 68,000 160,000
Brazil 933 1,300 35,000 57,000
China 2,000(e) 2,800 40,000 100,000
Gabon 1,490 1,600 52,000 90,000(1)
India 900(e) 940 56,000 150,000(1)
Mexico 125 130 4,000 8,000
South Africa 2,600 3,000 95,000 4,000,000(1)
Ukraine 580(e) 480 140,000 520,000
Other Countries 1,420 1,400 Small Small
World total (rounded)(e) 12,600(e) 14,000 500,000 5,200,000

World Resources: Land-based manganese resources are large but irregularly distributed; those of the United States are very low grade and have potentially high extraction costs. South Africa accounts for about 80% of the world’s identified manganese resources, and Ukraine accounts for 10%.

Substitutes: Manganese has no satisfactory substitute in its major applications.

(e) Estimated. — Zero.
(1) Includes inferred resources.
U.S. Geological Survey, Mineral Commodity Summaries, January 2009





HARGA MANGAN…. ???

3 08 2010
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3 August 04:30 Tokyo Commodity Exchange Gold 3,300 –  0.9 % 1.2 % 3,260 JPY / gram
3 August 03:30 Hong Kong Exchange Gold 1,115.1 1.5 % 1,098.6 $ USD / tr. oz
3 August 01:00 NM Commodity Exchange of India Ltd. Gold 16,435 –  1.9 % 16,760 RPS / 10 grams
Trading Live New York Mercantile Exchange Gold 3.70 1,184.5 2.0 % 8.0 % 1,097.1 $ USD / tr. oz
3 August 04:30 Tokyo Commodity Exchange Silver 500  –  2.9 % 1.0 % 495.2 JPY / 10 grams
3 August 01:00 NM Commodity Exchange of India Ltd. Silver 26,900 0.2 % 26,850 RPS / Kg
Trading Live New York Mercantile Exchange Silver 0.02 18.42 4.1 % 9.3 % 16.85 $ USD / tr. oz
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3 August 04:30 Tokyo Commodity Exchange Platinum 4,398  0.8 % 0.8 % 4,361 JPY / gram
2 August 20:30 Johnson Matthey Platinum 1,592 3.0 % 7.9 % 1,475 $ USD / tr. oz
Trading Live New York Mercantile Exchange Platinum + 7 1,606 4.5 % 9.0 % 1,473 $ USD / tr. oz
2 August 20:30 Johnson Matthey Rhodium 2,225  – 2.2 % –  11.0 % 2,500 $ USD / tr. oz
Trading Live New York Mercantile Exchange Rhodium 20 2,370 – 2.5 % –  10.9 % 2,660 $ USD / tr. oz
3 August 04:30 Tokyo Commodity Exchange Palladium 1,329  15.5 % 1,151 JPY / gram
2 August 20:30 Johnson Matthey Palladium 506 7.0 % 24.3 % 407 $ USD / tr. oz
Trading Live New York Mercantile Exchange Palladium + 10 518 10.0 % 26.7 % 409 $ USD / tr. oz
2 August 20:30 Johnson Matthey Iridium 720  69.4 % 425 $ USD / tr. oz
2 August 20:30 Johnson Matthey Ruthenium 200  – 2.4 % 25.0 % 160 $ USD / tr. oz
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3 August 04:30 CJ Commodity Exchange Nickel 1,131  1,131 JPY / Kg
3 August 01:00 NM Commodity Exchange of India Ltd. Nickel 1,087.4  24.1 % 876.1 RPS / Kg
2 August 20:30 London Metal Exchange Nickel 20,555 0.7 % 9.0 % 18,850 $ USD / Tonne
3 August 01:00 NM Commodity Exchange of India Ltd. Tin 822.5  5.4 % 780.25 RPS / Kg
2 August 20:30 London Metal Exchange Tin 19,545 1.6 % 16.8 % 16,740 $ USD / Tonne
3 August 01:00 NM Commodity Exchange of India Ltd. Copper 351.35  2.0 % 344.6 RPS / Kg.
2 August 20:30 London Metal Exchange Copper Grade A 7,190 2.8 % 1.4 % 7,294 USD / Tonne
Trading Live New York Mercantile Exchange Copper 20 2,370 2.5 % 608.8 % 334.35 US cents / lb.
3 August 04:30 Tokyo Commodity Exchange Aluminium 165  8.3 % 11.8 % 187 JPY / Kg
3 August 01:00 NM Commodity Exchange of India Ltd. Aluminium 101.9 2.1 % 104.1 10 Paise / Kg
2 August 20:30 London Metal Exchange Primary HG Aluminium 2,126 5.2 % 4.9 % 2,236 USD / Tonne
2 August 20:30 London Metal Exchange Aluminium Alloy 2,130 5.2 % 9.2 % 1,950 USD / Tonne
Trading Live New York Mercantile Exchange Aluminium + 0.01 0.83 0.83 USD / lb.
3 August 01:00 NM Commodity Exchange of India Ltd. Zinc 104.6  11.9 % 118.7 RPS / Kg
2 August 20:30 London Metal Exchange SHG Zinc 1,973 4.8 % 22.5 % 2,547 USD / Tonne
3 August 01:00 NM Commodity Exchange of India Ltd. Lead 96.05  13.8 % 111.4 RPS / Kg
2 August 20:30 London Metal Exchange Standard Lead 2,060 5.2 % 14.0 % 2,396 USD / Tonne

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Last Updated SOURCE METAL Last Price  % Change % Change Year-End Prices Units
RARE EARTH & MINOR METALS 1.Week YTD 31.Dec.2009
19 July 2010 NorthernMiner.com Antimony + 750 9,000  9.1 % 56.5 % 5,750 USD / Ton
19 July 2010 NorthernMiner.com Bismuth 0.18 8.4 2.1 % 8.4 % 7.75 USD / lb.
19 July 2010 NorthernMiner.com Cadmium + 0.04 1.94 2.1 % 14.1 % 1.7 USD / lb.
19 July 2010 NorthernMiner.com Cobalt 2 18 10.0 % 10.0 % 20 USD / lb.
19 July 2010 NorthernMiner.com Copper 0.16 2.94 5.3 % 5.9 % 3.12 USD / lb.
19 July 2010 NorthernMiner.com Indium 640 28.0 % 500 USD / Kg
19 July 2010 NorthernMiner.com Iridium 1.66 720 0.2 % 75.6 % 410 USD / tr. oz
19 July 2010 NorthernMiner.com Magnesium + 8.34 2,875 0.3 % 4.5 % 2,750 USD / Ton
19 July 2010 NorthernMiner.com Manganese 2,750 3.8 % 2,650 USD / Ton
19 July 2010 NorthernMiner.com Mercury + 33.33 983.33 3.5 % 78.8 % 550 USD / flask
19 July 2010 NorthernMiner.com Molybdenum Oxide 0.5 13.7 3.5 % 23.4 % 11.1 USD / lb.
19 July 2010 NorthernMiner.com Rhodium 108.33 2,333.33  4.4 % 2.0 % 2,287.5 USD / tr. oz
19 July 2010 NorthernMiner.com Ruthenium 35 200 14.9 % 23.1 % 162.5 USD / tr. oz
19 July 2010 NorthernMiner.com Selenium + 1.33 37.33 3.7 % 33.3 % 28 USD / lb.
19 July 2010 NorthernMiner.com Silver 1.12 17.7 6.0 % 4.3 % 16.97 USD / tr. oz
19 July 2010 NorthernMiner.com Tantalum (Ta2O5) 39.5  39.5 USD / lb.
19 July 2010 NorthernMiner.com Tin 0.24 17.83  1.3 % 13.1 % 15.77 USD / kg
19 July 2010 NorthernMiner.com Tungsten (WO3) 14,685 14,685 USD / Ton
19 July 2010 NorthernMiner.com Uranium (U3O8) + 0.75 41.5 1.8 % 7.8 % 45 USD / lb.
19 July 2010 NorthernMiner.com Vanadium(V2O5) 0.25 6 4.0 % 7.7 % 6.5 USD / lb.
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