Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Harmonised LUCAS in-situ data and photos on land cover and use from 5
  tri-annual surveys in the European Union   Accurately characterizing land surface changes with Earth Observation
requires geo-localized ground truth. In the European Union (EU), a tri-annual
surveyed sample of land cover and land use has been collected since 2006 under
the Land Use/Cover Area frame Survey (LUCAS). A total of 1,351,293 observations
at 651,780 unique locations for 117 variables along with 5.4 million photos
were collected during five LUCAS surveys. Until now, these data have never been
harmonised into one database, limiting full exploitation of the information.
This paper describes the LUCAS point sampling/surveying methodology, including
collection of standard variables such as land cover, environmental parameters,
and full resolution landscape and point photos, and then describes the
harmonisation process. The resulting harmonised database is the most
comprehensive in-situ dataset on land cover and use in the EU. The database is
valuable for geo-spatial and statistical analysis of land use and land cover
change. Furthermore, its potential to provide multi-temporal in-situ data will
be enhanced by recent computational advances such as deep learning.

28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
2
The categories of this paper are: math