Meteorology Fundamentals
This term describes the amount of water vapor in the air compared with the maximum amount the air can hold at that temperature.
What is the relative humidity?
GIS stands for this three-word term.
What is a Geographic Information System?
This type of thunderstorm produces a rotating updraft and is capable of producing tornadoes, large hail, and damaging winds.
What is a supercell?
To represent a fire hydrant as a single location, you would use this vector geometry type.
What is a point?
This instrument measures wind speed.
What is an anemometer?
This atmospheric layer contains the highest concentration of ozone, which absorbs much of the Sun's ultraviolet radiation.
What is the stratosphere?
Roads, rivers, and buildings can be displayed as separate collections of geographic information called these.
What are layers?
This scale is commonly used to rate the damage intensity of tornadoes from EF0 to EF5.
What is the Enhanced Fujita scale?
To represent the path of a road without showing its width, you would use this vector geometry type.
What is a line or polyline?
To select cities whose population field contains a value greater than 50,000, you would use this attribute-based selection tool.
What is Select By Attributes?
This type of wind develops when there is a significant difference in air pressure over a horizontal distance.
What is a pressure-gradient wind?
A school’s name, enrollment, and street address are examples of these descriptive properties of a feature.
What are attributes?
This boundary separates a warmer, drier air mass from a warm, humid air mass and can serve as a focus for severe thunderstorms.
What is a dryline?
To represent a park’s boundary and enclosed area, you would use this vector geometry type.
What is a polygon?
This radar product shows the intensity of precipitation and is commonly displayed using colors such as green, yellow, orange, and red.
What is radar reflectivity?
Air moving from high pressure toward low pressure is accelerated by this force, but its direction is altered by this force.
What are the pressure-gradient force and Coriolis force?
Changing a layer’s colors, shapes, and line widths changes this visual representation of its features.
What is symbology?
This phenomenon occurs when a thunderstorm's downdraft spreads outward after reaching the ground, producing strong, damaging winds.
This data model represents geographic information as a grid of cells arranged in rows and columns.
What is a raster?
Like a geographic cookie cutter, this tool keeps only the portions of road features inside a study-area polygon.
What is Clip?
A large difference between the air temperature and dew point indicates that the air has this characteristic.
What is low relative humidity?
This documentation describes a dataset’s origin and content, helping users understand the data before using them.
What is metadata?
This type of supercell typically develops in an environment with very large hail potential and a humid lower atmosphere.
What is a high precipitation (HP) supercell?
Points, lines, and polygons belong to this data model, which differs from the grid-based raster model.
What is a vector?
This instrument measures the height of cloud bases by sending a laser pulse upward and measuring the time it takes for the signal to return.
What is a ceilometer?