Geo-Information Tools Exam Questions
Date: ???
Before you start please note that you are to write your name and registration number on each page of the exam.
Name:
Registration number
This is an open book exam. The questions are to be answered individually. Collaboration between students is
not allowed.
The following up-to-date online help for ArcGIS 10 can be of use to you when answering the questions. The
link is:
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html
Of course you can also use the Help option of ArcMap or ArcCatalog.
There are 5 questions in total. How many points a question is given is indicated next to the question.
In total this gives 40 points. As a result 1 point corresponds with 1% of your final mark.
Before you start, please download the ZIP-file called GeoToolsWrittenExamDATA.zip from the News
webpage of the course site:
http://www.geo-informatie.nl/courses/grs20806_arcgis10/
Unpack the content of the ZIP file on the D-drive of your compute; make sure the path on the D-drive is:
D:\GeotoolsWrittenExam\workspace
The workspace folder has the following content:
Figure 1 Overview unpacked ZIP file
We wish you the best with this last straw of the course Geo-Information Tools GRS20806. We also hope you
enjoyed the course and that you can apply your gained knowledge in your further studies.
Aldo and John
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Question 1
(5 points total)
Use the feature datasets ps_CBSNEIGHBOURHOODS and ps_infrastructure for the following question.
For a project in the municipality of Rhenen, it is necessary to have the different road types of a specific
neighbourhood in raster format. In this case the neighbourhood called Donderberg is used to select the road
types in further raster calculations. This neighbourhood also has the BU_code value BU03400202.
A requirement in this project is that all parts of features roads types inside the neighborhood are also stored in
the raster format as best as possible. The cell assignment method when making the feature to raster conversion
can have an effect on the requirement. To demonstrate this, do the following:
1. Select the infrastructure inside the neighbourhood Donderberg.
How many features does this dataset have?
2. It is requested that you dissolve the previous result to create new features when adjacent features are of
the same type but loose features are kept as they are. This means you may not create multipart feature
when dissolving.
How many features does this dataset have?
How many Road Type classes are there in this dataset?
3. Convert this dataset to a raster dataset using the tool that allows you to change the Cell assignment type.
Make two rasters for the features in step 2. Use the parameter setting Cell assignment type is
Cell_center for the first raster and consequently Maximum_area for the second raster. Use 2 meters cell
size for both.
What differences do you detect between both rasters?
Which important parameter setting(s) does ArcGIS automatically compute to make feature to
raster conversion possible?
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Question 2
(16 points total) (each question 4 points)
The following question is to investigate how the INTERSECT tool works. To do this, two different intersection
calculations are compared using buffers around three selected road types in the municipality of Wageningen.
Create a model to:
Step 1.
Select the infrastructure in the municipality of Wageningen
Step 2.
Select the three road types with the following description to make one feature dataset:
o 'Mainroad > 7 meter' , 'Regional road > 7 meter' , 'Street'
Step 3.
Buffer each road type with a distance of 25 meters using the following options:
Step 4. Use this buffer dataset as an input for the Intersect Tool;
FIRST INTERSECT FEATURE DATASET NEEDED FOR QUESTIONS TO FOLLOW
Step 5.
Make three feature datasets, one per road type, using the buffer dataset of step 3 as input.
Use the following names; q2_main, q2_region, q2_street for the feature datasets.
Step 6.
Use these three feature datasets as inputs for a second Intersect Tool calculation:
SECOND INTERSECTION FEATURE DATASET NEEDED FOR QUESTIONS TO FOLLOW
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The SHAPE_area and SHAPE_perimeter fields have been left out of the following table overviews.
1. Do both intersection solutions give the following table structure: Yes / No?
If not which Intersection Tool calculation does: The First or Second?
2. How many polygon features are there with the table structure?
3. Which Intersection Tool Calculation has overlapping features: The First or Second?
4. What is the maximum number of overlapping features?
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Question 3
(9 points total) (each question 3 points)
a.
The census data is an example of information being saved in a spreadsheet format, see “Kerncijfers wijken en
buurten 2005-2010.xlsx”in the folder ExtraData.. Often the information is not saved in such a way that it can
be directly used in a GIS working environment.
Using the census data of the Dutch institute CBS , describe the difficulties that can be encountered and the
solutions that are needed when:
1. transforming the census data from a spreadsheet to a geo-database table
(give at least 4 difficulties encountered)
2. joining this census data to the neighbourhood feature dataset
(give at least 3 difficulties encountered)
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b.
The following attributes can be found in the entity of the dataset ps_CBSNEIGHBOURHOODS.
OBJECTID BU_CODE NEIGHB_CODE Shape_Area
Fill-in the following table:
Attribute
Storage Type
Attribute Scale
BU_CODE
NEIGHB_CODE
Shape_Area
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Question 4
(8 points) (each question 2 points)
In this course Geoinformation Tools, an introduction has been given in using tools that are frequently applied
in projects where GIS plays a role. However, there are many more tools available. It is expected that after this
course, you are able to assess yourself the use of other available tools in ArcGIS. This question is meant for this
purpose.
Make the following model using the buffered main and regional roads computed in question 3;
Note: use q3_Main as the first input for both tools:
1. Explain the difference between Update and Merge, after making the calculations.
2. Which raster tool is the equivalent of the Update tool?
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3. Do the results have Multipart polygons, Yes or NO?
Explain why it does or does not have Multipart polygons.
4. What is the equivalent tool to Multipart to Singlepart when working with raster data?
Explain how this raster tool works?
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Question 5 (3 points)
There are calculation inconsistencies in the
presented model.
1. Indicate in the model what they are and
explain why?
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