The BBS produces annual land use statistics for the country using secondary data. The aggregate land use is consistent with the total geographical area from the office of the Surveyor General of Bangladesh. The forest area is reported from the Office of the Chief Conservator of Forest. This area relates to notified gazette area and does not include private forest or forestry undertaken in public land under the social forestry program. The agricultural census provides a benchmark of land use with crop and non-crop utilization of land. In subsequent years, annually the benchmark land use statistics are calibrated for crop area using annual crop statistics available from the Agriculture Crop Production Surveys conducted by the BBS. These calibrations are carried out by the field staff of the BBS at upazila level and are aggregated at zila, region and national level. The land use statistics are available in the following five categories: 1. Total area (the total geographic area of Bangladesh) 2. Forest area (the area of government reserve forest. Private forests are not included.) 3. Not available for cultivation (urban area, big river area, important high ways etc.) 4. Cultivable waste area (cultivable but never cultivated) 5. Current fallow area (means that the area can be cultivated but for one or two seasons the land is kept fallow) 6. Net crop area (summation of single cropped area, double cropped area and triple cropped area)) The crop area data also provide information on: • single crop area (produced only one crop in a year), • double crop area (produced two crops in a year), • triple crop area (produced three cropped in a year), • quadruple crop area (produced four cropped in a year) and • total crop area. Along with other survey methods, the remote sensing technology (Remote Sensing Technology) is used to compile land use statistics as well as to calculate the area under crop land. In Bangladesh the Space Research and Remote Sensing Organization (SPARRSO) estimates only the area under Boro and Aman crops. In the near future, it is very important to take necessary steps to determine the area of land under different crops using this method.