Top 10 Questions for Orthophoto Tech/Draftsman Interview

1. What are the steps involved in creating an orthophoto?

The steps involved in creating an orthophoto are:

• Acquiring aerial imagery
• Preprocessing the imagery to correct for lens distortion and other geometric errors
• Creating a digital elevation model (DEM) to represent the terrain
• Orthorectifying the imagery using the DEM to create a geometrically accurate orthophoto
• Mosaicking the orthophotos to create a seamless image of the area of interest

2. What are the different types of orthophotos?

True orthophotos

• Created using a rigorous mathematical model to correct for all geometric distortions
• Have a consistent scale throughout the image

Quasi-orthophotos

• Created using a less rigorous mathematical model
• May have some geometric distortions, but are generally suitable for most mapping applications

Digital orthophotos

• Created using digital aerial imagery
• Can be stored and manipulated in a computer

3. What are the advantages of using orthophotos?

The advantages of using orthophotos include:

• High geometric accuracy
• Consistent scale throughout the image
• Can be used for a variety of mapping applications
• Can be easily updated as new aerial imagery becomes available

4. What are the disadvantages of using orthophotos?

The disadvantages of using orthophotos include:

• Can be expensive to create
• May not be suitable for all mapping applications
• Can be difficult to update in areas with rapidly changing terrain

5. What is the difference between an orthophoto and a planimetric map?

• Orthophotos are geometrically accurate aerial images
• Planimetric maps are graphic representations of the terrain that show the horizontal features, such as roads, buildings, and rivers
• Orthophotos can be used to create planimetric maps

6. What are the different software programs that can be used to create orthophotos?

There are a number of different software programs that can be used to create orthophotos, including:

• ERDAS IMAGINE
• PCI Geomatica
• ArcGIS
• QGIS

7. What is the best software program to use for creating orthophotos?

The best software program to use for creating orthophotos will depend on the specific needs of the project.

• If high geometric accuracy is required, then a software program that uses a rigorous mathematical model, such as ERDAS IMAGINE or PCI Geomatica, should be used.
• If the orthophotos will be used for a less demanding application, then a software program that uses a less rigorous mathematical model, such as ArcGIS or QGIS, may be sufficient.

8. What are the different types of drafting tools that can be used to create orthophotos?

There are a number of different drafting tools that can be used to create orthophotos, including:

• Digitizing tablets
• Scanners
• Computer-aided design (CAD) software

9. What is the best drafting tool to use for creating orthophotos?

The best drafting tool to use for creating orthophotos will depend on the specific needs of the project.

• If high geometric accuracy is required, then a digitizing tablet should be used.
• If the orthophotos will be used for a less demanding application, then a scanner or CAD software may be sufficient.

10. What are the different types of file formats that can be used to store orthophotos?

There are a number of different file formats that can be used to store orthophotos, including:

• TIFF
• JPEG
• PNG
• MrSID

An Orthophoto Tech/Draftsman is responsible for creating and maintaining orthophotos and other geospatial data. Their duties include:

1. Data Acquisition and Preparation

Gathering aerial and satellite imagery, as well as ground control points

• Checking the quality of the imagery and performing geometric corrections
• Importing and exporting data in various formats

2. Orthophoto Creation

Using specialized software to create orthophotos by correcting for lens distortion and terrain relief

• Matching orthophotos to existing maps and data
• Creating mosaics and composites

3. Drafting and Map Production

Creating maps, drawings, and other graphics using CAD software

• Digitizing features from orthophotos and other sources
• Adding labels, annotations, and other features to maps

4. Quality Control and Archiving

Checking the accuracy and completeness of orthophotos and maps

• Archiving data and maintaining backups
• Providing technical support to users

To prepare for an interview for an Orthophoto Tech/Draftsman position, you should:

1. Research the Company and Position

Learn about the company’s culture, mission, and products or services. Also, review the job description carefully and make note of the key requirements.

• Highlight any relevant skills and experience in your resume and cover letter
• Prepare questions to ask the interviewer about the company and position

2. Practice Your Answers

Think about common interview questions and prepare your answers in advance. Practice delivering your answers in a clear and concise manner.

• Use the STAR method to answer behavioral questions
• Quantify your accomplishments whenever possible

3. Be Prepared to Discuss Your Technical Skills

The interviewer will likely ask you about your experience with orthophoto creation, drafting, and map production software. Be prepared to discuss your proficiency in these areas.

• Bring a portfolio of your work to the interview
• Be prepared to answer questions about your software knowledge

4. Dress Professionally and Arrive on Time

First impressions matter, so make sure to dress professionally and arrive on time for your interview. This shows the interviewer that you are respectful of their time and are taking the interview seriously.

• Wear business attire
• Arrive at the interview location a few minutes early