CH/T 1009-2001 Basic Geographic Information Digital Products 1:10000, 1:50000 Digital Orthophoto CH/T1009-2001 Standard Download Decompression Password: www.bzxz.net

CH/T 1009
This standard is compiled based on GB/T1.3-1997
Part: Regulations on the Compilation of Product Standards. Previous
"Guidelines for Standardization Work
Unit 1: Rules for Drafting and Presenting Standards" Part 3
This standard is formulated to meet the needs of 1:10000 and 1:50 (000) digital orthophoto production, quality control and product distribution in digital surveying and mapping production and basic geographic information updating and database construction, with reference to the appendix of "1998 Interim Standard for Digital Production Technology" compiled by the State Administration of Surveying, Mapping and Geoinformation in July 1998, and based on the current production technology level. This standard is issued for the first time in China
This standard was proposed by the State Administration of Surveying, Mapping and Geoinformation and is under the jurisdiction of the drafting unit of this standard: the Surveying and Mapping Standardization Institute of the State Administration of Surveying, Mapping and Geoinformation. The main drafter of this standard: Jiang Zhanhong.
1 Scope
Surveying and Mapping Industry Standards of the People's Republic of China
Digital products of fundamental geographic information
1:10000 and 1:50000 digital orthophotos1: 10 000.1 : 50 000 digital ortnophoto maps CH/T 1009-2001
This standard specifies the classification, product labeling, technical indicators and technical requirements of 1:10000 and 1:50000 digital ortnophoto map products
This standard is applicable to the production, quality assessment and product distribution of 1:10000 and 1:50000 digital ortnophoto map products in digital surveying and mapping production and basic geographic information update and database construction. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard All versions are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest version of the following standards. GB/T13989-1992 National basic scale topographic map framing and numbering G13/17798-1999 Geospatial data exchange format GB/T18315-2001 Digital topographic map series and basic requirements GB12341-1990 1:25000, 1:50000, 1:100000 topographic map aerial photogrammetry field specifications GB/T1566 1—19951:5000, 1:10000, 1:250001:50000, 1:100000Topographic mapAerial photography specificationGB159681995Remote sensing image plan map production specificationGB/T18316—2001Digital surveying and mapping product inspection and acceptance regulations and quality assessmentCH/T1007-—2001Basic geographic information digital product metadataCH/T1008--2001Basic geographic information digital product1:10000, 1:50000Digital elevation model3Product description | |tt||Digital orthophoto map (Digital (orthophotoMap, referred to as DOM) is an image data set generated by using digital elevation model to digitize (or directly obtain digitally) aerial photos (or aerospace images), digitally corrected by differential correction, digital mosaic, and then cut according to the map range. It is one of the important components of my country's basic geographic information digital products. 4 Product classification
4.1 Classification
Digital orthophoto map products are divided into two categories according to color. The classification and code are shown in Table 1. Approved by the State Administration of Surveying, Mapping and Geoinformation on March 5, 2001
Implementation from April 1, 2001
4.2 Marking example
Image color
CH/T 1009 2001
Table"Digital Orthophoto Map Award
Product marking is used on product packaging and product labels, etc. The product marking should include the product name, product classification code, frame number and the standard number of the adopted standard. The examples are as follows: a) 1:10000 monochrome digital orthophoto map digital orthophoto map
H50G092005
b) 1:50000 color digital orthophoto map XXXXXXXXX
Standard number of the adopted standard
Frame frame number| |tt||Product classification code
Product name
Digital orthophoto map
CJ50E017016
xxxxxxXxx--xxxx
Standard number of the adopted standard
Map sheet number
Product classification code
-Product name
5 Technical indicators
5.1 Spatial positioning reference system
The positioning reference system of digital orthophoto map products shall be implemented in accordance with GB/T18315-2001. 5.2 Accuracy
The mean error of the plane position of the digital orthophoto map shall be implemented in accordance with GB/T18315--2001, and twice the mean error is specified as its maximum error limit. The other technical indicators are shown in Table 2.
Table 2 Technical indicators of digital orthophoto
Image ground resolution
Gradient (radiance resolution)
Edge limit
6 Technical requirements
256 grayscale
1 or more
Plain land, hilly land 5m
Mountain, high mountain land 8m
1:10000
1:50000
256 levels
1 or more
Plain land, hilly land 25m
Mountainous land 40mm
6.1 The digital orthophoto map shall be extended to the four sides according to the map outline range specified in GB/T13989--1992 (about 10mm1 in Figure 1). The data shall be provided in units of rectangular coverage. 6.2 The images in the entire map and the entire basic geographic information database should have appropriate contrast and uniform color tone. The mosaicked digital orthophoto 390
CH/T1009-2001
images should not have obvious grayscale changes at the mosaic edge. 6.3 It should be joined with adjacent digital orthophoto images. The error of joining should not exceed the provisions of Table 2. After joining, there should be no image cracks or image blur. www.bzxz.net
6.4 The digital elevation model used for geometric correction of digital orthophoto images should meet the accuracy requirements specified in CH/T1008-2001. When there is no DEM that meets the accuracy requirements, a DEM with double the accuracy can also be used for image correction. The (field) control points and sensor calibration data should meet the requirements of GB12341--1992 and GB/T15661--1995. 6.5 The outline finishing content of the digital orthophoto map shall be implemented in accordance with GB15968--1995. The finishing style shall be implemented in accordance with Appendix B of GB15968---1995, excluding the image joint outline part. Necessary core elements and annotations may be added as needed. 6.6 The outline finishing and annotation parts of the digital orthophoto map can be stored in the form of vector or raster files or stored in layers. 6.7 Digital orthophoto map products should contain metadata. The metadata content and filling rules shall be implemented in accordance with (H/T1007--2001). 6.8 Digital orthophoto map products should include the image positioning point information in the data body header or in a separate file. 7 Product packaging
Digital orthophoto map products use CDs as the main storage medium, and tapes or disks can also be used. The outer packaging must include trademarks, product marks, production units, production time, edition/year, price, etc. 8 Product testing method
The testing method of digital orthophoto products shall be in accordance with GB/T18316---2001. 9 Product inspection rules (quality assessment procedures) The inspection rules of digital orthophoto products shall be in accordance with GB/T18316---2001. 10 Product distribution format
The distribution format of digital orthophoto products shall be in accordance with GB/T17798-3--1999.
11 Confidentiality
The production, distribution and use of digital orthophoto products shall be in accordance with the State Security Law of the People's Republic of China and relevant regulations.
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