HJ 726-2014 English PDF

US$499.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
HJ 726-2014: Technical Specification for Exchange of Environmental Spatial Data
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
HJ 726-2014	499	Add to Cart	4 days	Technical Specification for Exchange of Environmental Spatial Data	Valid

Similar standards

HJ 511   HJ 945.3   HJ 943   

Basic data

Standard ID: HJ 726-2014 (HJ726-2014)
Description (Translated English): Technical Specification for Exchange of Environmental Spatial Data
Sector / Industry: Environmental Protection Industry Standard
Word Count Estimation: 19,124
Date of Issue: 12/25/2014
Date of Implementation: 3/1/2015
Quoted Standard: GB 2312-1980; GB 13000-2010; GB/T 22239-2008; HJ/T 724-2014
Regulation (derived from): Ministry of Environmental Protection Notice 2014 No. 87
Issuing agency(ies): Ministry of Ecology and Environment
Summary: This standard specifies the environmental space description XML data exchange information, exchange models, exchange basis, exchange processes, data exchange quality and safety requirements and so on. This standard applies for the construction and managem

HJ 726-2014: Technical Specification for Exchange of Environmental Spatial Data

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical Specification for Exchange of Environmental Spatial Data National Environmental Protection Standard of the People 's Republic of China Technical specification for environmental space data exchange 2014-12-25 release 2015-03-01 Implementation Ministry of Environmental Protection released 1 Scope of application 1 2 normative reference document 1

3 Terms and Definitions

4 Abbreviations .2 5 environment spatial data exchange information XML description 2 Environmental Spatial Data Exchange Model 7 Environment Space Data Exchange Foundation 6 8 environment spatial data exchange process 7

9 Environmental space data and its metadata exchange quality requirements

10 Environmental space data security requirements Appendix A (normative) Environmental spatial data structure Appendix B (informative) Common software platform and the corresponding data format Appendix C (informative) Common data format conversion problems and solutions 15

Foreword

For the implementation of the "People's Republic of China Environmental Protection Law" to promote environmental information work, strengthen the environmental space data Rationalize and standardize the spatial data exchange process, promote the sharing and application of environmental spatial data, and develop this standard. This standard specifies the environmental spatial data exchange information XML description, exchange model, exchange basis, exchange process, the number According to the exchange of quality requirements and safety requirements and so on. Appendix A to this standard is a normative appendix, Appendix B, Appendix C is an informative appendix. This standard is the first release. This standard is organized by the Ministry of Environmental Protection Science and Technology Standards Division. The main drafting of this standard. Information Center of the Ministry of Environmental Protection, Environmental Protection Department of the Ministry of Environmental Protection, Beijing North Fang Hui Hui System Technology Co., Ltd. The Environmental Protection Department of this standard approved on December 25,.2014. This standard is implemented on March 1,.2015. This standard is explained by the Ministry of Environmental Protection. Technical specification for environmental space data exchange

1 Scope of application

This standard specifies the environmental spatial data exchange information XML description, exchange model, exchange basis, exchange process, the number According to the exchange of quality requirements and safety requirements and so on. This standard applies to environmental protection departments at all levels of environmental space data exchange and transmission, and environmental spatial data The construction and management of the exchange system.

2 normative reference documents

This standard refers to the terms of the following documents. For undated references, the valid version applies to this standard. Basic set of character set for Chinese characters in information exchange GB 2312-1980 GB 13000-2010 Information technology Universal multi-octet character set (ucs) Information security - Technical information systems - Safety level - Basic requirements for protection GB/T 22239-2008 Technical specification for processing and processing of environmental basic spatial data HJ/T 724-2014

3 terms and definitions

The following terms and definitions apply to this standard. 3.1 Environmental spatial data Environmental protection information in the field of application of all the spatial position directly or indirectly related to the data, according to the data grid Type is divided into environment vector data and environment raster data. 3.2 Environmental spatial data exchange Distributed in different regions, different departments, different systems in the environmental space data exchange, transmission. 3.3 Environmental spatial metadata Describe the number of environmental spatial data content, quality, presentation, spatial reference, management, and other features according to. 3.4 Vector data vector data The data represented by the geometric elements. 3.5 Raster data raster data Is represented as a regular spatial array of data.

4 acronym

The following abbreviations apply to this standard. XML Extensible Markup Language (Extensible Markup Language) GML Geography Markup Language JTS java Topology Suite (Java Topology Suite)

5 Environmental spatial data exchange information XML description

5.1 character set Environment Space Data Exchange XML Description The character set used should conform to GB 13000-2010 or GB 2312-1980 Regulations. 5.2 namespace Environment Space Data Exchange XML Description uses a namespace of. 5.3 Schema description The spatial spatial data structure information is described in Appendix A. Environmental Spatial Data Exchange Model 6.1 Composition of environment spatial data exchange model 6.1.1 The spatial spatial data exchange model consists of a spatial data exchange engine, an external spatial data system, an internal spatial data system System, application system and other components, as shown in Figure 1. 6.1.2 Application The system can exchange data in two ways. A) through the spatial data exchange engine, the first external space data system data exchange to the internal space data System, the application system through the internal spatial data system to achieve data exchange. B) the application system through the spatial data exchange engine in the GIS function components to parse the way to directly read the external space Data in the system. 6.1.3 Environment The spatial data exchange engine supports the exchange of environmental spatial data and its associated metadata, including environmental spatial data Two types of data stored in spatial data files and spatial databases, the specific exchange of content and format requirements to comply with the 6.3 Regulations. Figure 1 Environment space data exchange model 6.2 Technical requirements for environmental space data exchange 6.2.1 Environment Space Vector data exchange takes GML as a unified data exchange format. In the environment spatial data exchange model Must establish a unified and scalable GML converter, the GML converter should have a different format of the environment empty The ability of the inter-vector data to be converted to GML format data without loss. For the exchange of environmental raster data, metadata can be passed Service access to the corresponding metadata information, through the data read and write parts for the exchange operation, the transmission process should be off The ability to resume. 6.2.2 According to the actual conversion needs, decide whether to call the model of the topology converter. If the converted data comes with Topology, you should select the topology converter. Topology converter technology can be used to achieve middleware JTS and other middleware. 6.2.3 Data exchange, by the unified data read and write parts according to the acquired environmental spatial data metadata information, the different Read and write operations. 6.3 Environment space data exchange content and format 6.3.1 Environment space data exchange contents The contents of the environmental space data exchange shall be in accordance with the provisions of HJ/T 724-2014 and shall be consistent with consistency, completeness and Specifications and other requirements. 6.3.2 Environment Space Data Interchange Format 6.3.2.1 Environment vector data exchange format The environment vector data takes GML as the unified data exchange format to realize the transmission and delivery of different format vector data change. 6.3.2.2 Environment Raster Data Interchange Format The environment raster data uses the versatile GeoTIFF, ECW, IMG, HDR format for data transmission and delivery. change. 6.4 Environmental space data exchange mode 6.4.1 Point-to-point swap mode Point-to-point switching mode refers to the message sender to send the data in a queue way to a designated receiver's ring The exchange pattern of spatial data. There are no restrictions on the number of senders who can send messages to the queue target, but each message Can only be sent to and successfully used by a recipient, as shown in Figure 2. Figure 2 Point-to-point swap mode The point-to-point exchange model is applied to the exchange of environmental spatial data between high-level nodes, such as the environment between national departments Spatial data exchange. 6.4.2 Publish/subscribe exchange mode The publish/subscribe exchange mode refers to the fact that the sender of the message sends the data first to the subject and then the subject To the exchange mode of the environmental spatial data of all recipients who have subscribed to the topic. Can be sent to the theme of the target The number of senders is not limited, and each message can be sent to any number of message recipients. Theme goal It also supports the concept of a durable subscription that the recipient has registered with the subject target, but the recipient is in the message Inactive, this message will be received when the recipient is active again, as shown in Figure 3. Figure 3 Publish/subscribe exchange mode The sender/receiver of the publish/subscribe exchange mode is loosely coupled in multidimensional space. Spatial uncoupled. senders and recipients do not have to know each other. Time uncoupled. senders and recipients do not have to be online at the same time. Data streams are not coupled. the sender and receiver are asynchronous. The publish/subscribe exchange mode is applied to the exchange of environmental spatial data between sub-nodes and sub-nodes, such as the ring between provincial departments Environment space data exchange. 6.5 Environmental Spatial Data Metadata The environmental spatial data metadata is data used to describe the basic additional information of the exchanged data, such as coordinate system, projection Way, resource providers and other content, the metadata structure shown in Table 1, Table 2 shows. Table 1 Environment vector data metadata structure Children file name, storage format, latest change time, production unit, date of manufacture, contact phone, contact person Name, scale, geographic coordinate system, map projection, elevation datum, projection band number, upper left latitude, left Upper latitude, right lower right latitude, right lower latitude, space coverage, safety limit classification, summary Use of metadata structure Source See Appendix A, A.1 Environment Vector Data Metadata Structure Table 2 Environment Raster Data Metadata Structure File name, storage format, production unit, date of manufacture, contact number, contact name, satellite Name, shooting time, resolution, geographic coordinate system, map projection, elevation datum, projection band number, Left latitude longitude, upper left latitude, right lower right latitude, lower right latitude, abstract Use of metadata structure Source See Appendix A, Section A.2 Environment Raster Data Metadata Schema

7 Environmental space data exchange basis

7.1 network The environment space data exchange should follow the computer network foundation, the network communication foundation, the network transmission agreement, the local area network group Network mode, network communication security and other requirements to ensure that the data link interoperability. 7.2 hardware and software The switching nodes at all levels should rely on the data transmission and exchange platform as the support, according to the spatial data exchange model technical requirements The establishment of the corresponding data exchange system, can also be used to meet the data exchange of commercial software as a support for the exchange system. 7.3 Spatial data The requirements for spatial data shall be in accordance with the requirements of HJ/T 724-2014, such as naming, mathematical basis (geodetic coordinate system, Projection, etc.) and data quality requirements.

8 environment spatial data exchange process

8.1 Identity authentication Sub-node users to log in at the sub-node to check whether there is a digital certificate, if not, by the sub-node to The master node to apply for a certificate, the main node certificate authentication service for the sub-node issued a digital certificate, the sub-node using the certificate letter For authentication, to complete the login; if the sub-node already exists digital certificate, the sub-node users can directly Recorded, as shown in Figure 4. Figure 4 Identity authentication and response process 8.2 data download Sub-node user login, according to the digital certificate, to the main node to apply for download data, the main node verification, the number of provided According to the download service, the data is downloaded from the master node by the sub-node, as shown in Fig. Figure 5 data download process 8.3 break off Data download process, the emergence of an interruption, you can choose to break off. First by the sub-node self-test has been passed The data message of the data, obtains the data breakpoint information, generates the data string according to the message rule, and sends the data to the master node Request; the master node break-through service receives the processing request message and returns the data to the sub-node according to the request contents, such as Figure 6, Figure 7 shows. Figure 6 breakpoint resume process diagram Figure 7 breakpoint resume process

9 Environmental space data and its metadata exchange quality requirements

9.1 Environmental spatial data and metadata exchange shall meet the requirements for the accuracy, completeness and correctness of the data. 9.2 Environmental vector data exchange quality requirements A) No loss of space entities; B) space entity position without offset; C) the geometric accuracy of the space entity complies with the requirements of HJ/T 724-2014; D) space entity attribute content is not lost. 9.3 Environmental raster data exchange quality requirements A) grid format for the GeoTIFF, ECW, IMG, HDR and other formats; B) the size of the grid unit (or cell), the number of ranks and the value of the grid unit should remain unchanged; C) The description of the raster data should remain complete and correct. 9.4 Metadata exchange quality requirements Data exchange should be exchanged at the same time metadata, metadata to complete the content, and should be in XML format. 10 Environmental space data security requirements The safety requirements for environmental space data shall be governed by the provisions of GB/T 22239-2008.

Appendix A

(Normative appendix) Environment spatial data structure A.1 Environment vector data metadata structure

Appendix B

(Informative) Common software platform and the corresponding data format B.1 Common software platform and the corresponding vector data format comparison table Table B.1 Comparison between the software platform and the corresponding vector data format B.2 Common software platform and the corresponding raster data format comparison table Table B.2 Comparison between the software platform and the corresponding raster data format

Appendix C

(Informative) Common Data Format Conversion Problem and Its Solution C.1 format conversion problem Table C.1 format conversion problem table Data format conversion type conversion problems DWG combination disappears. WT/WL/WP combination disappears. DGN combination disappears. SDB combination disappears. Shapefile annotation turns to point. Round, arc, oval and so on to turn line. E00 round, arc, oval and so on to turn line. Geodatabase combination disappears. Point processing. 1, the block is converted to line; 2, the block is converted to point. Polyline In the arc to the polyline, the spline to fold line. WT/WL/WP Polyline in the arc into a polyline, the sample line to polyline. The arc in the DGN Polyline is converted to a polyline and the spline turns to a polyline. SDB spline turns to polyline. Block processing. 1, the block into the line combination graphics; 2, the block is converted to point graphics. Polyline in the arc, round, arc, oval, spline and so on For the polyline. Polyline in the arc, round, arc, oval, spline and so on For the polyline. Block processing. 1, the block into the line combination graphics; 2, the block is converted to point graphics. Spline turns to polyline. Unit processing. 1, the unit is converted to line; 2, the unit is converted to a point. Polyline in the arc, spline and so on to turn line. WT/WL/WP Polyline in the arc into a polyline, the sample line to polyline. DWG Polyline in the arc into a polyline, spline to fold line. The arc in the SDB Polyline is converted to a polyline and the spline turns to a polyline. Shapefile Unit processing. 1, the unit to line graphics; 2, the unit is converted to point. Polyline in the arc, round, arc, oval, spline and so on For the polyline. Polyline in the arc, round, arc, oval, spline and so on For the polyline. Geodatabase Unit processing. 1, the unit to line combination graphics; 2, the unit is converted to Point graphics. Spline turns to polyline. Tab curves are turned into polylines. DGN curve and so on to turn line. DWG curves are turned into polylines. SDB curve and so on to turn line. Shapefile circles, arcs, ellipses, curves, etc. are converted to polylines. E00 round, arc, oval, curve and so on to turn line. Shapefile circle, arc, ellipse, curve, etc. are turned into polyline. E00 round, arc, oval, curve and so on to turn line. SDB - > Geodunk spline turns to polyline. C.2 format conversion problem solution Table C.2 Solution to format conversion problems Problem handling method The combination disappears Unit to line combination graphics The unit is converted to a dot pattern Block to line combination graphics The block is converted to a dot pattern Reassemble and rebuild the topology. Note to point to re-add annotation. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of HJ 726-2014_English be delivered?

Answer: Upon your order, we will start to translate HJ 726-2014_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of HJ 726-2014_English with my colleagues?

Answer: Yes. The purchased PDF of HJ 726-2014_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.