VHR orthomosaic imageries produced by dedicated drone flight campaigns over Lithuania (2021-2022) - Vilnius -AOI 2

In the context of the EU-funded project DIONE (No. 870378), targeted drone flight campaigns were conducted in determined Areas of Interest (AOIs) in the Lithuanian territory as a complementary source of information to the spaceborne Earth Observation (EO) open-accessed data. Such an activity attempted to overcome the limited capabilities of EO coarse resolution data to identify small-scale features alongside the agricultural fields, such as the non-productive Ecological Focus Areas (EFAs) and overall to enhance the quality and accuracy (1m or less) of the estimated Land Cover/Land Use elements.

The dataset is in fact a collection of drone orthomosaic images delivered in GeoTIFF data format, which were acquired from the drone flight missions over the second AOI located near the capital of Lithuania, (Vilnius). For each area, four flight campaigns were scheduled and conducted on the following dates:     

1st flight: 24-27/5/2021

2nd flight: 26-29/7/2021

3rd flight: 13-16/9/2021

4th flight: 25-28/8/2022

本数据集依托欧盟资助项目DIONE（编号：870378）开展。研究团队在立陶宛境内划定的感兴趣区域（Areas of Interest，AOIs）内实施了针对性无人机飞行作业，作为星载地球观测（Earth Observation，EO）开放获取数据的补充信息源。本次作业旨在弥补EO粗分辨率数据难以识别农田周边小型地物（如非生产性生态聚焦区（Ecological Focus Areas，EFAs））的能力局限，整体提升地表覆盖/土地利用（Land Cover/Land Use）要素估算的精度与质量，可实现1米及以内的空间分辨率。

本数据集为基于立陶宛首都维尔纽斯附近第二处感兴趣区域的无人机飞行任务所获取的无人机正射影像集合，数据存储格式为GeoTIFF。针对该区域，研究团队共规划并开展了四次无人机飞行作业，具体日期如下：
1. 首次飞行：2021年5月24日至27日
2. 第二次飞行：2021年7月26日至29日
3. 第三次飞行：2021年9月13日至16日
4. 第四次飞行：2022年8月25日至28日