name: equivalent to name displayed on the load screen.
pic1, pic2, pic3: manually created by curator to show most representative locations, for easiest identification.
size: subjectively-estimated size (five categories) for relative size comparison.
maxplayers: suggested number of players for each map. Exceeding the number can lead to confusing situations and less-strategic matches.
maxteamsize: half of maxplayers value. Maximum recommended players per team in a team game with 2 teams.
A: Anarchy. Map suited for Anarchy games.
TA: Team Anarchy. Map suited for team matches.
CTF: Capture The Flag. Map supports Capture The Flag game mode.
MB: Monsterball. Map supports Monsterball game mode.
RC: Race. Map type that features a wind tunnel in a infinite loop that only allows restricted player movement.
dl_link: Link to download page from overloadmaps.com, the best download source for Overload maps.
base_map: Map included in base game. If yes, a download is not available.
popularity: Curator opinion, based on how often a map is being played on the community servers.
prefered_weps: Recommended weapon, well-suited for this map.
ammo_energy: Curator recommendation for a weapon category that can have advantages over others in this map.
weird_gfx: Existence of known graphical problems (mainly chunk issues).
geometry: Describing typical visual features.
teleport: The presence of teleporters.
windtunnel: The presence of wind tunnels.
supers: Whether a map has a super spawn point or not.
superspawns: The number of super spawn points.
additional_weap_infos: General notes that hint at certain issues or features.
homes: Whether a map is selected as home map by an OTL team or not. Mouseover lists team names.
date: Latest release date according to overloadmaps.com
author: Name of the map maker
similarities: Whether this map has striking similarities to other maps.
youtube: Link to Insaner's "The one minute map showcase" on YouTube.
check_err: Developer notes
buginfo: Known bugs and issues, mouseover lists details.
rating cache: Averaged rating on a 1-5 scale.
gamecount: The number of times a map has been played on community servers since [...] according to the logs on otl.gg