VHR orthomosaic imageries produced by dedicated drone flight campaigns over Lithuania (2021-2022) - Vilnius -AOI 1, Sub-region 1

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 first subregion of the first AOI located near the capital of Lithuania, (Vilnius). For each area, four flight campaigns were scheduled and conducted on the following dates: <strong>1st flight:</strong> 24-27/5/2021 <strong>2nd flight:</strong> 26-29/7/2021 <strong>3rd flight:</strong> 13-16/9/2021 <strong>4th flight:</strong> 25-28/8/2022在欧盟资助项目DIONE（编号：870378）的框架下，研究团队针对立陶宛境内的选定感兴趣区域（Areas of Interest, AOI）开展了针对性无人机飞行任务，作为星载地球观测（Earth Observation, EO）开放获取数据的补充信息源。此项作业旨在弥补EO粗分辨率数据在识别农田周边小型地物（如非生产性生态重点区域（Ecological Focus Areas, EFA））时的能力局限，整体提升土地覆盖/土地利用要素估算的质量与精度（分辨率可达1米及以下）。该数据集实则为采用GeoTIFF格式存储的无人机正射影像合集，采集自立陶宛首都维尔纽斯附近首个AOI的第一个子区域的无人机飞行任务。针对每个区域，共规划并实施了四次航次作业，具体日期如下：<strong>第一次飞行：</strong>2021年5月24日至27日 <strong>第二次飞行：</strong>2021年7月26日至29日 <strong>第三次飞行：</strong>2021年9月13日至16日 <strong>第四次飞行：</strong>2022年8月25日至28日