Esri ArcGIS Desktop Associates Part 1
UPDATED Questions and CORRECT
Answers
What is LAS data - CORRECT ANSWER - The LAS dataset is a file in a folder for lidar
data and may show surface charateristics.
What is the difference between a mosaic dataset and a raster catalog? - CORRECT
ANSWER - A raster dataset requires you to write the entire raster dataset to disk, whereas
a mosaic dataset only references the source files (such as the LAS dataset), thereby taking up
much less space and being much faster to create. You can also modify the surface type in a
mosaic dataset (such as bare earth or first return); however, a raster dataset can only be stored
using one surface type that cannot be altered. Also, you can query the data held in a mosaic
dataset by information such as location and date.
What is the feature class to feature class tool used for? - CORRECT ANSWER - To create
a copy of a feature class without certain attribute fields.
When should you use the repair geometry data management tool? - CORRECT
ANSWER - To inspect multiple features in a feature class and automatically fix their
geometry. Example: remove duplicate vertex, overlapping polygons will be dissolved, null
geometry values will be deleted.
How to repair broken data links in content panel? - CORRECT ANSWER - Filter contents
by broken data link and select properties. Change the datasource for that layer.
What is the append tool used for? - CORRECT ANSWER - Use this tool to add new
features or other data from multiple datasets into an existing dataset.
When to use define coordinate system? - CORRECT ANSWER - When dataset has an
unknown or incorrect coordinate system defined.
, What is a projection, transformation and coordinate system? - CORRECT ANSWER -
Projection - A projection is the means by which you display the coordinate system and your data
on a flat surface, such as a piece of paper or a digital screen.
Coordinate System - a frame of reference for your data, to locate features on the surface of the
earth.
Transformation - convert data between different coordinate systems.
Good process for exporting raster data. - CORRECT ANSWER - Use the Export Raster
Data dialog box.
What is the difference between short integer and long integer? - CORRECT ANSWER -
Short integer is -32,768 to 32,767 only. Long integer can be used for larger integers.
What is raster pyramids used for? - CORRECT ANSWER - Displaying large rasters more
efficiently.
What type of geodatabases are there and what are they used for? - CORRECT ANSWER -
Personal Geodatabase - 2 GB max, single user. (File)
File geodatabase - up to 1 TB, small workgroups. (File)
Enterprise Geodatabase - No limit (DBMS Limit), multiple users and writers, hosted on a server.
What is a relationship class used for? - CORRECT ANSWER - Maintaining associations
between objects. Great to use for parent child relationships.
How can you fix topology errors with ArcMap? - CORRECT ANSWER - Use the error
inspector or right click and select fix topology on the exclamation mark.
What are cached layers and what are they good for? - CORRECT ANSWER - They are
prerendered collecions of map cartography or 3D objects organized by location and scale. Great
for fast efficient visualization online. (cannot be re projected on the fly)
UPDATED Questions and CORRECT
Answers
What is LAS data - CORRECT ANSWER - The LAS dataset is a file in a folder for lidar
data and may show surface charateristics.
What is the difference between a mosaic dataset and a raster catalog? - CORRECT
ANSWER - A raster dataset requires you to write the entire raster dataset to disk, whereas
a mosaic dataset only references the source files (such as the LAS dataset), thereby taking up
much less space and being much faster to create. You can also modify the surface type in a
mosaic dataset (such as bare earth or first return); however, a raster dataset can only be stored
using one surface type that cannot be altered. Also, you can query the data held in a mosaic
dataset by information such as location and date.
What is the feature class to feature class tool used for? - CORRECT ANSWER - To create
a copy of a feature class without certain attribute fields.
When should you use the repair geometry data management tool? - CORRECT
ANSWER - To inspect multiple features in a feature class and automatically fix their
geometry. Example: remove duplicate vertex, overlapping polygons will be dissolved, null
geometry values will be deleted.
How to repair broken data links in content panel? - CORRECT ANSWER - Filter contents
by broken data link and select properties. Change the datasource for that layer.
What is the append tool used for? - CORRECT ANSWER - Use this tool to add new
features or other data from multiple datasets into an existing dataset.
When to use define coordinate system? - CORRECT ANSWER - When dataset has an
unknown or incorrect coordinate system defined.
, What is a projection, transformation and coordinate system? - CORRECT ANSWER -
Projection - A projection is the means by which you display the coordinate system and your data
on a flat surface, such as a piece of paper or a digital screen.
Coordinate System - a frame of reference for your data, to locate features on the surface of the
earth.
Transformation - convert data between different coordinate systems.
Good process for exporting raster data. - CORRECT ANSWER - Use the Export Raster
Data dialog box.
What is the difference between short integer and long integer? - CORRECT ANSWER -
Short integer is -32,768 to 32,767 only. Long integer can be used for larger integers.
What is raster pyramids used for? - CORRECT ANSWER - Displaying large rasters more
efficiently.
What type of geodatabases are there and what are they used for? - CORRECT ANSWER -
Personal Geodatabase - 2 GB max, single user. (File)
File geodatabase - up to 1 TB, small workgroups. (File)
Enterprise Geodatabase - No limit (DBMS Limit), multiple users and writers, hosted on a server.
What is a relationship class used for? - CORRECT ANSWER - Maintaining associations
between objects. Great to use for parent child relationships.
How can you fix topology errors with ArcMap? - CORRECT ANSWER - Use the error
inspector or right click and select fix topology on the exclamation mark.
What are cached layers and what are they good for? - CORRECT ANSWER - They are
prerendered collecions of map cartography or 3D objects organized by location and scale. Great
for fast efficient visualization online. (cannot be re projected on the fly)
