Keyhole satellite imagery between 1960 and 1980 has attracted attention from all walks of life. Here are some suggestions that may enhance the expression and integrity of the article:
1.Emphasizing the Historical Significance of Satellite Imagery:
Highlight the preciousness of satellite imagery, which provided a true record of the geography of the time as an early Earth observation tool.
It is mentioned that these images have irreplaceable value for the study of historical geographic information and human information, especially in the recording of natural landforms, urban construction, agricultural distribution, etc.
2.Description of technical limitations:
The technical limitations of early satellite imagery, such as smaller photographic image sizes and limited resolution, are explained in more detail to highlight the challenges of the technological state of the time.
The introduction of the fact that the GPSS has not been developed highlights the lack of accurate positioning information in the imagery, which needs to be corrected by other means to increase the reader's understanding of data processing.
3.The specific content and application of the image:
Geographic features recorded in satellite imagery, such as rivers, oceans, roads, settlements, vegetation, etc., are specifically enumerated to demonstrate the broad coverage of the data.
The resolution and correction accuracy of these data are pointed out, which provides a reliable basis for subsequent research.
4.Insights into socio-economic data:
It is emphasized that through inversion data and comparative analysis of the current situation, many socio-economic data with research value can be obtained.
It mentions the clear and recognizable features of the shorelines of rivers and lakes, the coastlines of islands, urban buildings, and the distribution of agricultural land, highlighting the wide application of these images in social development research.
5.Outlook for future development trends:
Supplementing the end of the article, we look forward to the potential value of these images in future research, which may provide more insights into future social and natural development trends.
Through these adjustments, the article can be made more coherent and in-depth, and the important role of keyhole satellite imagery in the study of geographical changes and urban changes can be better conveyed.