Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast Mapping onto Census Blocks   Pandemic measures such as social distancing and contact tracing can be
enhanced by rapidly integrating dynamic location data and demographic data.
Projecting billions of longitude and latitude locations onto hundreds of
thousands of highly irregular demographic census block polygons is
computationally challenging in both research and deployment contexts. This
paper describes two approaches labeled "simple" and "fast". The simple approach
can be implemented in any scripting language (Matlab/Octave, Python, Julia, R)
and is easily integrated and customized to a variety of research goals. This
simple approach uses a novel combination of hierarchy, sparse bounding boxes,
polygon crossing-number, vectorization, and parallel processing to achieve
100,000,000+ projections per second on 100 servers. The simple approach is
compact, does not increase data storage requirements, and is applicable to any
country or region. The fast approach exploits the thread, vector, and memory
optimizations that are possible using a low-level language (C++) and achieves
similar performance on a single server. This paper details these approaches
with the goal of enabling the broader community to quickly integrate location
and demographic data.

16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics