Some soils are easy to work independent of moisture conditions, other soils are only manageable at an adequate moisture status, in particular for manual cultivation or light machinery. The NASA Shuttle Radar Topographic Mission (SRTM) has provided digital elevation data (DEMs) for over 80% of the globe. Excess of free salts referred to as soil salinity is measured as Electric Conductivity (EC in dS/m) or as saturation of the exchange complex with sodium ions, which is referred to as sodicity or sodium alkalinity and is measured as Exchangeable Sodium Percentage (ESP). van Velthuizen, L. Verelst, D. Wiberg, 2008. The values in this layer are for the dominant soil in each mapping unit (sequence field = 1). I was successful in connecting the Microsoft Access database provided by HWSD to ArcGIS Desktop 10.1 using Build Raster Attribute Table tool. Tolerance of crops to calcium carbonate and gypsum varies widely (FAO, 1990; Sys, 1993). IIASA, Laxenburg, Austria and FAO, Rome, Italy. Number of 3 arc second grid cells that belong to the land mask and fall into respective 5 minutes or 30 arc second grid cells. 毕业临近，很多同学开始忙碌各自的毕业论文。其中，一部分同学的论文会涉及到HWSD数据的使用，通常包括两类问题：数据从哪里下载？ This soil quality SQ6 is therefore only including calcium carbonate and gypsum related toxicities. The Harmonized World Soil Database v 1.2 is the result of a collaboration between the FAO with IIASA, ISRIC-World Soil Information, Institute of Soil Science, Chinese Academy of Sciences (ISSCAS), and the Joint Research Centre of the European Commission (JRC). Harmonized World Soil Database 1km, 30 arc-second (HWSD v1.21) / IIASA. Calcareous soils exhibit generally micronutrient deficiencies, for instance of iron, manganese, and zinc and in some cases toxicity of molybdenum. 2. Watch later. I am working in SWAT12 in ArcMap 10.0. Download shapefile Harmonized World Soil Dataset - Major Soil Groups ... اسس مع السيد Jack Dangermond شركة ESRI وهي الشركة التي تنتج برمجيات ArcGIS وهي الشركة الرئدة في هذا المجال . Data sources for the Harmonized World Soil Database (HWSD)4) The original 30 arc-sec grids were expanded 11 to match with the GAUL country boundaries 12 . UNESCO Digital Soil Map of the World, into a new comprehensive Harmonized World Soil Database (HWSD). The sum of all classes for slopes and aspects respectively is 100 percentages. The resulting raster database consists of 21600 rows and 43200 columns, which are linked to harmonized soil property data. The data is presented as a percentage share of the total grid-cell extent for a 5' latitude by 5' longitude grid-cell. This soil quality is estimated by multiplying of the soil depth limitation with the most limiting soil or soil phase property. However, size_x depends on latitude and is calculated separately for each row of a tile. The data currently being distributed by NASA/USGS (finished product) contains “no-data” holes where water or heavy shadow prevented the quantification of elevation. 全国土壤数据集，来源于联合国粮农组织（FAO）和维也纳国际应用系统研究所(IIASA)所构建的世界和谐土壤数据库(Harmonized World Soil Database )(HWSD),该数据库于2009年3月26日发布了1.1版本.该数据可为建模者提供模型输入参数,农业角度可用来研究生态农业分区,粮食安全和气候变化等。 Slope aspects are classified in 5 classes: N:        0˚ < aspect ≤ 45˚ or 315˚ < aspect ≤ 360˚ E:         45˚ < aspect ≤ 135˚ S:         135˚ < aspect ≤ 225˚ W:        225˚ < aspect ≤ 315˚ U:         Slope aspect undefined; this value is used for grids where slope gradient is undefined or slope gradient is less than 2 %. UNESCO Digital Soil Map of the World, into a new comprehensive Harmonized World Soil Database (HWSD). Six geographic datasets were used for the compilation of an inventory of seven major land cover/land use categories at 5’ resolution. Anyone with Video/Tutorial/Written procedures how to work with HWSD till it … The document Harmonized World Soil Database Version 1.2 provides more detail on the soil texture attributes contained in this layer. Along coastlines 5 minutes or 30 arcsecond grid cells usually only contain a fraction of the higher resolution 3 arc second grid cells, which were used for the slope and aspect calculations. Salinity affects crops through inhibiting the uptake of water. 1. 中国土壤数据中国30S ：T_USDA_TEX: Real (USDA土壤质地分类) 中国土壤类型空间分布数据，数据来源于Hamonized World Soil Database (version 1.1), 2009年，数据联合国粮农组织（FAO）和维也纳国际应用系统研究所(IIASA)所构建的世界土壤数据库(Harmonized World Soil Database … Irregular soil depth, gravel and stones in the profile and rock outcrops, might prevent the use of heavy farm machinery. recognized in the Harmonized World Soil Database (HWSD). This layer provides access to a 30 arc-second (roughly 1 km) cell-sized raster with attributes related to soil hydrology derived from the Harmonized World Soil Database v 1.2. Soil qualities have been estimated for the sequence 1 soils in each grid cell with as reference crop maize. Starting values of class weights used in the iterative procedure were obtained by cross-country regression of statistical data of cultivated and forest land against land cover class distributions obtained from GIS, aggregated to national level. Moderate salinity affects growth and reduces yields; high salinity levels may kill the crop. The most limiting of the combination of excess calcium carbonate and gypsum in the soil, and occurrence of petrocalcic and petrogypsic soil phases is selected for the quantification of SQ6. Soil pH serves as indicator for aluminum toxicity and for micro-nutrient deficiencies. Thus if the real percentage distribution of a particular 5 minutes or 30 arc second is required it can be calculated using the land mask. The SRTM data is publicly available as 3 arc second (approximately 90 meters resolution at the equator) DEMs (CGIAR-CSI, 2006). row n. where xxx is a number. Soil qualities and related soil characteristics, Soil texture, soil organic carbon, soil pH, total exchangeable bases, Soil Organic carbon, Soil texture, base saturation, cation exchange capacity of soil and of clay fraction, Soil textures, bulk density, coarse fragments, vertic soil properties and soil phases affecting root penetration and soil depth and soil volume, Soil drainage and soil phases affecting soil drainage, Soil salinity, soil sodicity and soil phases influencing salt conditions, Soil texture, effective soil depth/volume, and soil phases constraining soil management (soil depth, rock outcrop, stoniness, gravel/concretions and hardpans). Otherwise aspE = 45˚ (for (dz/dx) < 0) or aspE = 270˚ (for (dz/dx) > 0). Nutrient retention capacity refers to the capacity of the soil to retain added nutrients against losses caused by leaching. How should I set the spatial reference in order to get the appropriate scale? Dr. Andrew Jarvis of the CIAT Land Use project, in collaboration with Dr. Robert Hijmans and Dr. Andy Nelson, have further processed the original DEMs to fill in these no-data voids. Soil hydrology refers to the hydrologic processes occurring in the soils. Important soil characteristics of the topsoil (0-30 cm) are: Texture/Structure, Organic Carbon (OC), pH and Total Exchangeable Bases (TEB). Download : Download viewer & data (only soil types)   |    Download database (.mdb)  | HWSD Raster | Technical Report and Instructions. The land mask shows the number of 3 arc second grid cells in the SRTM data that fall into a 5 minutes or 30 arc second grid cell. The soil quality SQ7 is derived by combining the most limiting soil/soil phase attribute with the average of the remaining attribute coditions. These are generally small holes, which nevertheless render the data less useful, especially in fields of hydrological modelling. pixel counts) of the respective slope or aspect classes calculated for 3 arc-sec data and accumulated to 30 arc-sec and 5 min latitude/longitude grid cells respectively. This story map was created with the Story Map Cascade application in ArcGIS Online. The database was compiled as a joint activity of FAO and ISRIC-World Soil Information as a contribution to the upcoming Harmonised World Soil Database . This state-of-the-art database was achieved in partnership with: • ISRIC-World Soil Information together with FAO, which were responsible for the development of regional soil and terrain databases and the WISE soil profile database; References CGIAR-CSI (2006): NASA Shuttle Radar Topographic Mission (SRTM). The Harmonized World Soil Database is a 30 arc-second raster database with over 15 000 different soil mapping units that combines existing … Shopping. Agricultural modellers often need detailed soil profile data with which to run their models. Row 1 of the data is at the top of the grid, row 2 is just under row 1 and so on. Medium textured: sandy loams, loams, sandy clay loams, silt loams, silt, silty clay loams and clay. A detailed description including technical details is provided in the documentation file. The slope aspect, i.e. The file format is, NCOLS xxx NROWS xxx XLLCENTER xxx | xllcorner xxx> YLLCENTER xxx | yllcorner xxx> CELLSIZE xxx NODATA_VALUE xxx row 1 row 2 . Undefined: Slope aspect undefined; this value is used for grids where slope gradient is undefined or slope gradient is less than 2%. Trusted Windows (PC) download Harmonized World Soil Database 1.10. The data are provided as ASCII files in a grid format. The resulting raster database consists of 21600 rows and 43200 columns, which are linked to harmonized attribute data. For latitudes over 60 degrees north elevation data from GTOPO30 (USGS, 2002) with a resolution of 30 arc-seconds (depending on latitude this is approximately a 1 by 1 km cell size) were used. Note that the data files are in ascii format. 90m resolution) DEMs. Diagnostic characteristics to indicate soil workability vary by type of management applied. I have soils data from (HWSD) database. Virus-free and 100% clean download. Global Agro-ecological Zones Assessment for Agriculture (GAEZ 2008). a spatial population density inventory (30-arc seconds) for year 2000 developed by FAO-SDRN, based on spatial data of LANDSCAN 2003, with calibration to UN 2000 population figures. Copy link. Rooting conditions include effective soil depth (cm) and effective soil volume (vol. Active 2 years, 7 months ago. Gypsum strongly limits available soil moisture. In the HWSD these are: Oxygen availability in soils is largely defined by drainage characteristics of soils. Urban land and land required for housing and infrastructure. The derived maps for the individual soil qualities represent therefore the qualities of ‘main soils’ only. The use of a standardized structure allows for the linkage of the attribute data with the raster map to display or query the composition in terms of soil units and the characterization of selected soil parameters (organic Carbon, pH, water storage capacity, soil depth, cation exchange capacity of the soil and the clay fraction, total exchangeable nutrients, lime and gypsum contents, sodium exchange percentage, salinity, textural class and granulometry). FAO Soils Portal Links to global, national and FAO legacy maps (scans), also soil profiles and reports, soil degradation, management, biodiversity. Number of 3 arc second grid cells that belong to the land mask and fall into 30 arcsecond grid cells. ESB soil phases and other soil depth/volume related characteristics: stony, lithic, petrocalcic, petroferric, fragipan and duripan, and presence of gravel or concretions, obstacles to roots (6 classes), and impermeable layers (4 classes). In the 5 minutes and 30 arc second grids the slopes and aspect distributions always sum up to 100 percent. longitude in our case), y direction (i.e. Soil hydrology includes aspects such as; drainage class, water storage capacity and the impermeable layer depth. Regional and National Soil Maps and Databases, Joint Research Centre of the European Commission (JRC), https://ec.europa.eu/jrc/en/scientific-tool/global-land-cover, Regional Office for Europe and Central Asia, Regional Office for Latin America and the Caribbean, Regional Office for the Near East and North Africa, GLC2000 land cover database at 30 arc-sec (. The database was derived from the Harmonized World Soil Data Base (HWSD ver. The best way to save them to your computer is to click on the link with the right mouse button and select "Save Link As..." or "Save Target As...". Flown aboard the NASA Space Shuttle Endeavour February 11-22, 2000, the SRTM successfully collected data from over 80 percent of the Earth’s land surface, for most of the area between 60º N. and 56º S. latitude. 2.0), EROS Data Centre (EDC, 2000); FAO’s Global Forest Resources Assessment 2000 (FAO, 2001) at 30 arc-sec. The end of each row of data from the grid is terminated with a carriage return in the file. Get Harmonized World Soil Database alternative downloads. Losses vary with the intensity of leaching which is determined by the rate of drainage of soil moisture through the soil profile. Other attributes contained in this layer include: Soil Mapping Unit Name - the name of … The percentage of urban/built-up land in a grid-cell was estimated based on presence of respective land cover classes as well as regression equations relating built-up land with number of people and population density. 中国土壤类型空间分布数据，数据来源于Hamonized World Soil Database (version 1.1), 2009年，数据联合国粮农组织（FAO）和维也纳国际应用系统研究所(IIASA)所构建的世界土壤数据库(Harmonized World Soil Database version 1.1 )(HWSD). absence of shrinking and swelling properties (vertic) affecting root and tuber crops. Soil texture affects nutrient retention capacity in two ways, through its effects on available exchange sites on the clay minerals and by soil permeability. Workability or ease of tillage depends on interrelated soil characteristics such as texture, structure, organic matter content, soil consistence/bulk density, the occurrence of gravel or stones in the profile or at the soil surface, and the presence of continuous hard rock at shallow depth as well as rock outcrops. The Harmonized World Soil Database is a 30 arc-second raster database with over 15 000 different soil mapping units that combines existing regional and national updates of soil information worldwide ( SOTER, ESD, Soil Map of China, WISE) with the information contained within the 1:5 000 000 scale FAO-UNESCO Soil Map of the World (FAO, 1971-1981). irrigated cultivated land, according to GMIA 4.0, forest land, calibrated to FRA2000 land statistics, built-up land (residential and infrastructure). Low pH leads to acidity related toxicities, e.g., aluminum, iron, manganese toxicities, and to various deficiencies, e.g., of phosphorus and molybdenum. Harmonized World Soil Database (version 1.1), FAO, Rome, Italy and IIASA, Laxenburg, Austria. Relevant soil properties considered are: soil depth, soil texture/structure, vertic properties, gelic properties, petric properties and presence of coarse fragments. Workability constraints are therefore handled differently for low/intermediate and high inputs. This data set describes select global soil parameters from the Harmonized World Soil Database (HWSD) v1.2, including additional calculated parameters such as area weighted soil organic carbon (kg C per m2), as high resolution NetCDF files. For the illustration of soil qualities, maize was selected as reference crop because of its global importance and wide geographical distribution. Viewed 389 times 1. The resulting seven land use land cover categories shares are: Workability (constraining field management). FAO 90 soil phases: rudic, lithic, pertroferric, placic, skeletic, fragipan and duripan. On the basis of soil parameters provided by HWSD seven key soil qualities important for crop production have been derived, namely: nutrient availability, nutrient retention capacity, rooting conditions, oxygen availability to roots, excess salts, toxicities, and workability. These interpolated DEM values were then used to fill in the original no-data holes within the SRTM data. Rooting conditions may be affected by the presence of a soil phase either limiting the effective rooting depth or decreasing the effective volume accessible for root penetration. Accumulation of salts may cause salinity. Nutrient retention capacity is of particular importance for the effectiveness of fertilizer applications and is therefore of special relevance for intermediate and high input level cropping conditions. To produce distributions of slope gradients and aspects for grids at 30 arc-sec or 5 min latitude/longitude, slope gradients are groups into 9 classes: C1:       0 % ≤ slope ≤ 0.5 % C2:       0.5 % ≤ slope ≤ 2 % C3:       2 % ≤ slope ≤ 5 % C4:       5 % ≤ slope ≤ 10 % C5:       10 % ≤ slope ≤ 15 % C6:       15 % ≤ slope ≤ 30 % C7:       30 % ≤ slope ≤ 45 % C8:       Slope > 45 % C9:       Slope gradient undefined (i.e., outside land mask). Number of 3 arc second grid cells that belong to the land mask and fall into 5 minutes grid cells, North: 0˚< aspect ≤45˚ or 315˚< aspect ≤360˚. Note that the classes used in the Soil Quality evaluation are: Remember that classes are qualitative not quantitative. To calculate terrain slope for grid cell E, the algorithm proceeds as follows: 1.) Data Citation: Fischer, G., F. Nachtergaele, S. Prieler, H.T. For further information please consult the following link. This is the result of a collaboration between the FAO with IIASA, ISRIC-World Soil Information, Institute of Soil Science, Chinese Academy of Sciences (ISSCAS), and the Joint Research Centre of the European Commission (JRC). 世界土壤数据库(Harmonized World Soil Database version 1.2 )(HWSD V1.2).其中，中国地区数据源为全国第二次土地调查由南京土壤所所提供的1:1,000,000土壤数据。数据格式:grid栅格格式，投影为WGS84。采用的土壤分类系统主要为FAO-90。 [1] Harmonized World Soil Database v 1.2 Online. Harmonized World Soil Database. the orientation of the slope gradient, starting from north (0 degrees) and going clock-wise, is calculated using the variables from above, as follows: The above expression can be evaluated for (dz/dy) ≠ 0. Use of a standardized structure allows linkage of the attribute data with GIS Harmonized World Soil Database (version 1.0) 8. These data were regridded and upscaled from the Harmonized World Soil Database v1.2. The most limiting of the combined soil salinity and/or sodicity conditions and occurrence of saline (salic) and/or sodic soil phase is selected. When E falls on a border row or column (i.e., rows or columns 1 or 6000 of a tile) the required values falling outside the current tile are filled in from the neighboring tiles. I am trying to use the data of the HWSD in QGIS. These processed SRTM data, with a resolution of 3 arc second (approximately 90m at the equator), i.e. They consist of header information containing a set of keywords, followed by cell values in row-major order. Details of estimation procedures for the individual soil qualities from soil characteristics in HWSD are: This soil quality is decisive for successful low level input farming and to some extent also for intermediate input levels. Acidity related toxicities such as aluminum toxicities and micro-nutrient deficiencies are accounted for respectively in SQ1, nutrient availability, and in SQ2, nutrient retention capacity. These procedures take into account soil type, soil texture, soil phases and terrain slope. This study is making use of the drainage class feature of the soil. The computer algorithm used to calculate slope gradient and slope aspect operates on sub-grids of 3 by 3 grid cells, say grid cells A to I: SRTM data are stored in 5˚x5˚ tiles*. The available data cover a raster of  24 rows by 72 columns of 5˚ x 5˚ latitude/longitude tiles, from north 60 degree latitude to 56 degree south. The SRTM is a joint project between NASA and NGA to map the Earth’s land surface in three dimensions at a level of detail unprecedented for such a large area. The datasets used are: An iterative calculation procedure has been implemented to estimate land cover class weights, consistent with aggregate FAO land statistics and spatial land cover patterns obtained from (the above mentioned) remotely sensed data, allowing the quantification of major land use/land cover shares in individual 5’ by 5’ latitude/longitude grid cells. (IFPRI, 2002), based on a reinterpretation of the Global Land Cover Characteristics Database (GLCC ver. This state-of-the-art database was achieved in partnership with: • ISRIC-World Soil Informationtogether with FAO, which were responsible for the development of regional soil and terrain databases and the WISE soil profile database; resolution; digital Global Map of Irrigated Areas (GMIA) version 4.0 of (FAO/University of Frankfurt) at 5’ by 5’ latitude/longitude resolution, providing by grid-cell the percentage land area equipped with irrigation infrastructure; IUCN-WCMC protected areas inventory at 30-arc-seconds (. This story map was created with the Story Map Cascade application in ArcGIS Online. It describes the movement and behaviour of water (Brevik, 2012). The dataset is available for download at: http://srtm.csi.cgiar.org/, USGS (2002): GTOPO30 – Global 30 arc second elevation data. an IFPRI global land cover categorization providing 17 land cover classes at 30 arc-sec. The Harmonized World Soil Database is a 30 arc-second raster database with over 15 000 different soil mapping units that combines existing regional and national updates of soil information worldwide (SOTER, ESD, Soil Map of China, WISE) with the information contained within the 1:5 000 000 scale FAO-UNESCO Soil Map of the World (FAO, 1971-1981). The following factors are considered in the evaluation: Soil depth/volume limitations affect root penetration and may constrain yield formation (roots and tubers). توفي عام 2014 . Fields are available for each of these attributes related to hydrology: Nature helps our fight for a safe climate ... Harmonized World Soil Database (version 1.2). The soil characteristics used for topsoil are respectively: Organic Carbon (OC), Soil Texture (Text), Base Saturation (BS), Cation Exchange Capacity of soil (CECsoil), pH, and Cation Exchange Capacity of clay fraction (CECclay). Table 1. Only classes 1 to 4 are corresponding to an assessment of soil limitations for plant growth. Soil qualities are related to the agricultural use of the soil and more specifically to specific crop requirements and tolerances. Info. Under an agreement with the National Aeronautics and Space Administration (NASA) and the Department of Defense's National Geospatial Intelligence Agency (NGA), the U.S. Geological Survey (USGS) is now distributing elevation data from the Shuttle Radar Topography Mission (SRTM).
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