Nghiên cứu ứng dụng một số loại ảnh viễn thám độ phân giải cao, siêu cao có chi phí thấp trong cập nhật cơ sở dữ liệu nền thông tin địa lý tỷ lệ 1/10.000 và 1/25.000

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Tác giả: Thị Phương Thảo Đỗ, Văn Ngọ Nghiêm, Văn Lợi Nguyễn, Thị Hiền Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 623.71 Intelligence and reconnaissance topography

Thông tin xuất bản: Khoa học Tài nguyên và Môi trường, 2021

Mô tả vật lý: 103-109

Bộ sưu tập: Metadata

ID: 494634

Thêm vào giỏ

The adjustment of topographic maps and updating geographic information database by satellite images have mainly used VNREDSAT-1, SPOT6/7, Worldview2/3. However, some cases avaiable images do not meet the coverage requirements or have a relatively high cost. In fact, there are some new satellites, such as PlanetScope, RapidEye, SkySat which generate high, super-high resolution images, advantages of shooting time and lower cost. However, small image size (2.5-8 km) of such new satellites may lead to difficulties in image processing. The purpose of this paper is to evaluate the applicability of some low-cost high-resolution satellite images (PlanetScope, RapidEye, SkySat) in addition to the existing remote sensing data sources for updating the geographic information database ratio 1/10,000 and 1/25,000. To achieve the above goal, the paper has researched, analyzed, evaluated the geometric processing and mozaic through from theory to experiment to get conclusions about the applicability of some high and super high resolution remote sensing images in practice. The research results show that PlanetScope images meet the requirements for updating geographic infomation database at ratio 1 / 25,000 and the super-high resolution images (e.g. SkySat) meet the requirements for updating geographic infomation database at the ratio of1/10,000.Việc hiện chỉnh bản đồ địa hình và cập nhật cơ sở dữ liệu nền thông tin địa lý bằng ảnh vệ tinh thường sử dụng một số loại ảnh như VNREDSAT-1, SPOT6/7, Worldview2/3. Tuy nhiên, một số trường hợp không đáp ứng được yêu cầu về độ phủ trùm hoặc là có giá thành tương đối cao. Trong khi đó hiện nay có một số loại ảnh độ phân giải cao và siêu cao như PlanetScope, RapidEye, SkySat có độ phân giải tương đương nhưng có ưu điểm hơn về thời gian chụp và có giá thành thấp hơn. Tuy vậy, ảnh vệ tinh mới này cũng có nhược điểm là kích thước ảnh khá nhỏ (2,5 - 8 km) nên có những khó khăn trong quá trình xử lý. Mục đích của bài báo này là đánh giá khả năng ứng dụng một số nguồn ảnh mới (PlanetScope, RapidEye, SkySat) như nguồn dữ liệu bổ sung bên cạnh các nguồn dữ liệu viễn thám hiện có trong cập nhật cơ sở dữ liệu nền thông tin địa lý tỉ lệ 1/10.000 và 1/25.000. Để đạt được mục tiêu trên, bài báo đã nghiên cứu, phân tích, đánh giá việc xử lý hình học và ghép ảnh thông qua phương pháp đi từ lý thuyết đến thực nghiệm để có được được kết luận về khả năng ứng dụng một số loại ảnh viễn thám độ phân giải cao, siêu cao trong thực tiễn. Kết quả nghiên cứu cho thấy, ảnh viễn thám độ phân giải cao PlanetScope đáp ứng được yêu cầu cập nhật cơ sở dữ liệu nền thông tin địa lý tỉ lệ 1/25.000 và ảnh độ phân giải siêu cao SkySat đáp ứng được yêu cầu cập nhật cơ sở dữ liệu nền thông tin địa lý tỉ lệ 1/10.000.

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