A Research on Quality Evaluation Method for Thematic Monitoring Results

The geographical condition is a very important component of a country's national condition, and geographical conditions monitoring (GCM) has been a great concern to the Chinese government. In accordance with application areas, GCM can be divided into fundamental monitoring, thematic monitoring, and disaster monitoring. Thematic monitoring is a special type of designated subject monitoring that concerns the public or the government. This paper mainly discusses the quality evaluating method of thematic monitoring results (TMRs). Based on analysis, referring to GB/T 24356-2009 "Quality Inspection and Acceptance of Surveying and Mapping Achievements", TMRs data Including monitoring data results, analysis and evaluation results, map results and monitoring report results. The operability of the quality evaluation model is illustrated by a case study of the quality inspection of urban geographic national condition monitoring.


INTRODUCTION
The results of thematic geographic condition monitoring (TMRs) are based on spatial data. According to the requirements of different projects, spatial data are analyzed and modeled to form thematic data sets, statistical analysis results, map results and thematic monitoring reports. From the tracking statistics year by year, we can get the past, the present situation and the forecast of the future development. The results of thematic geographic and national conditions monitoring are the basis for the decision-making of the government and administrative departments, which must be guaranteed to be accurate and reliable. We have carried out inspection and acceptance of the quality of the project results. How to ensure the unification of quality evaluation content and quality evaluation scale, the project team carried out research, put forward the quality evaluation model of thematic results, and applied the model to carry out a pilot evaluation of the thematic results of urban geographic national condition monitoring in a certain year.

CHARACTERISTICS OF THEMATIC OUTCOMES
Through the comparative analysis of the basic and thematic monitoring results, the characteristics of the thematic results are as follows.

There are many kinds of data sources.
TMRs originally include geographic information data sources, thematic data sources and various image data sources.

The process of production analysis is complex.
The thematic monitoring of geographical and national conditions includes six topics: first, monitoring of land and space development; second, monitoring of resource conservation and utilization; third, monitoring of ecological environment protection; fourth, monitoring of urbanization development; fifth, monitoring of major national strategies and overall regional development; and sixth, other monitoring. The analytical models for each topic are different.

The results are manifested in various forms.
MRs include data sets in GDB format, analysis and evaluation results, multi-temporal and multi-source image results, thematic map results in map category, and report results and statistical results in document category.

The results vary greatly.
On the one hand, the amount of data for each topic varies. When the number of thematic datasets is small, there are thousands of elements and hundreds of thousands of elements. On the other hand, the degree of specialization of thematic achievements is high. In addition to traditional surveying and mapping disciplines, it will also involve the integration of humanities, ecological environment and urban development. As a quality inspector, it is very difficult to fully grasp the characteristics of other disciplines and the calculation model of data.

RESEARCH EMPHASIS
The research emphasis of quality evaluation of TMRs is to construct quality evaluation model, including inspection object, inspection content, sampling method, quality evaluation model, quality evaluation system and quality evaluation method.

Object of inspection
The basic objects of TMRs inspection and quality evaluation include TMRs data set, analysis and evaluation results, Graphic products and TMRs Reports.

Sampling method
TMRs should be checked as a whole. TMRs data set, analysis and evaluation results and Graphic products can be carried out according to the situation, and the data with a ratio of not less than 10% can be extracted in units of administrative divisions, regions, element sets and ranges.

Quality Evaluation Model
Because the results of each quality element of the project results are cross-referenced, the quality evaluation model is to evaluate the project results as a whole. Among them, TMRs data set is the basis of analysis and evaluation results, Graphic products and TMRs Reports, with a large proportion of weight. The

Quality Evaluation System
The evaluation system and quality evaluation method are derived from the quality inspection and acceptance of GB/T 24356-2009 surveying and mapping results. According to the severity of the problem detected, it is judged which type belongs to A, B, C and D, and the corresponding score is deducted.  (2) ……………………(2) S1--Score Value of Mass Elements； S2i--Score Value of the First Mass Subelement in Mass Elements； pi--The Weight of the First Mass Subelement in Mass Elements； n--Number of Mass Subelements in Mass Elements。 3.Grading of achievement quality according to formula (3) …………………………(3) S--Outcome Score Value； S1i--Score value of the first mass element； pi--The i Quality Element Weight； n--Number of quality elements contained in the results。 4.The quality evaluation of thematic achievements can be divided into excellent, good, qualified and unqualified evaluation systems.
Quality score Quality grade 90 points < =S <= 100 points excellent 75 points <= S < 90 points good 60 points < =S < 75 points qualified S < 60 points Unqualified Table 4 Grade of Quality Assessment of Thematic Achievements

CASE ANALYSIS
Taking the special topic of urban geographic national condition monitoring as an example, this paper analyses how to carry out quality evaluation of a special geographic national condition monitoring result. The monitoring of urban geography and national conditions is mainly to carry out comprehensive monitoring of urban space, the level of basic public services, the monitoring of urban comprehensive transportation network, the monitoring of spatial pattern changes of urban agglomerations, the relocation and transformation of old industrial zones in urban areas and the thematic monitoring of sponge cities, which are suitable for the needs of new-type urbanization construction. Its results can provide practical data support and decision-making basis for the formulation of new urbanization policies.

4.1.1
The monitoring results of urban geographic conditions include: 1. 108 urban comprehensive monitoring data sets; 4 typical urban agglomeration monitoring data sets; 4 sponge-type urban data sets; 21 urban old industrial areas monitoring data sets. 2. Four analysis and evaluation results; the comprehensive analysis and evaluation results of urban space, the analysis and evaluation results of spatial pattern of urban agglomerations; the analysis and evaluation results of the implementation effect of typical regional construction of sponge-type cities; the analysis and evaluation results of the implementation of relocation and transformation of old industrial zones.
3. 108 urban comprehensive monitoring maps; 4 typical urban agglomeration monitoring maps; 4 sponge-type urban maps; 21 urban old industrial zones maps. 4. Four monitoring reports: comprehensive monitoring report of urban space; monitoring report of spatial pattern change of urban agglomeration; monitoring report of implementation effect of typical regional construction of sponge city; monitoring report of relocation and transformation of old industrial zone. 4.1.2 According to the 3.3 sampling method, the sampling results are as follows: 1. 11 urban comprehensive monitoring data sets; 4 typical urban agglomeration monitoring data sets; 4 sponge-type urban data sets; 3 urban old industrial areas monitoring data sets.
2. Overall examination of the results of four analysis and evaluation.
3. 11 urban comprehensive monitoring maps; 4 typical urban agglomeration monitoring maps; 4 sponge-type urban maps; 3 old industrial district maps of urban areas.

Check the main problem description
Four quality elements, TMRs data set, analysis and evaluation results, Graphic products and TMRs Reports were examined. The main problems are as follows: 1. TMRs data set (1) Incomplete data integration and lack of urban monitoring data sets in 2 provinces; (2) The organizational structure of some data sets is inconsistent with the requirements of the design document.

Analysis of evaluation results
Individual tables are missing from the analysis and evaluation results (i.e. statistical summary tables). 3. Graphic products (1) A Graphic product is not standardized, such as missing scale; (2) The data format and file naming of some drawings are inconsistent with the requirements of the design book; 4. TMRs Reports (1) Individual statistical values are inconsistent with the results of analysis and evaluation; (2) A small amount of written expression is inconsistent with the results of tables, analysis and evaluation; (3) Individual errors in illustrations and tables.

Quality evaluation
According to 4.2 inspection results and 3.6 quality evaluation formula, the evaluation is shown in

CONCLUSIONS
TMRs is a new work, and there is no quality evaluation model for such results at present. In this paper, a general quality inspection model of project results is proposed. The model defines the sampling method and unifies the evaluation criteria and criteria. Through the case study of thematic inspection of urban geographic national condition monitoring, it shows that the evaluation model is suitable for thematic results quality inspection. The evaluation results help project organizers to understand the quality of results, help project producers to better improve the quality of thematic results, and effectively guarantee the integrity, standardization and unity of thematic results. The next step is to expand the scope of thematic results inspection and propose more perfect inspection rules to facilitate the better use of quality inspectors.