See attached directions
Requirements: First question: 1-5 sentences. Second question: Over 300 words
LAB 10. CROWDSOURCED MAPPING
Author: Ran Tao and Elisabeth Sedano
Today you be one of the crowds to create volunteered geographic information (VGI) with OpenStreetMap (OSM). OSM contains may more types of spatial data than streets, and its reach is worldwide. Thousands of people have contributed to the map, and its accuracy has been shown to be as good as its commercial counterparts in many cases. However, the completeness of the dataset is an issue: developed counties and urban settings have more complete coverage than developing countries and rural areas.
Given the openness of the platform, it is now used to map areas in need, and which are not fully mapped. The Humanitarian OpenStreetMap Team (HOT) selects parts of the world in need of mapping and organizes the mapping effort. You will make your contributions today!
None. This lab is intended for lower division undergraduate students in the sciences. It does not require prior knowledge of the spatial concepts or GIS skills.
DATA, SOFTWARE TOOLS, AND WORKFLOW
The data comes along with the mapping services. A browser is sufficient to finish this exercise.
This exercise consists of the following tasks:
Explore OpenStreetMap and compare it with Google Maps
Complete a Walkthrough tutorial on mapping with OSM
Map 10 buildings and 5 road segments for a specified HOT project
SECTION Ⅰ. EXPLORE OSM
Open a browser, go to .
Click the Start Mapping icon towards the left of the page.
Create an OSM account, if you do not already have one (Figure 1). Be sure to use an email address that you have access to right now, because OSM will send an email to this address you use to confirm the account. Make note of the Display Name that you choose – you will share this with your lab instructor via your lab report, so we can check your mapping results.
Figure 1. OSM Sign Up page.
Check the inbox for the email you used to sign up, and confirm your OSM account.
Return to the OSM homepage and log in. Type ‘University of South Florida’ into the search bar and the map zooms to our campus.
Open Google Maps in a new browser tab and zoom to our campus. Explore our campus with OSM and compare it side by side with Google Maps. Find at least two differences in terms of map features or map design, e.g. building outline, missing map info on one of them, map symbol, label, style, etc. Take screenshots of the differences for answering Q1.
SECTION Ⅱ. HUMANIATARIAN OSM TEAM PROJECT
Now, you will harness the “power of the crowd” to map for humanitarian relief. Open a new tab and go to: . Click Start Mapping and log in with your OSM account.
You are taken to OSM Tasking Manager, which lists all active HOT humanitarian mapping projects. On the menu, choose the difficulty level as Beginner mapper, and click Roads and Buildings in More filters and then Apply. The list of projects shown on the right will update automatically. Choose any one of it to make your own contribution. (Note: all HOT projects are updated in real time according to the recent crisis as well as the volunteers’ contributions. If a project has been contributed heavily as the progress bar is close to the finish line, find another project to work with.)
Click into the project to read the description to learn about the purpose of the project. Then, click Contribute at the bottom-right corner to read the instructions of how to contribute. Finally, click Map-a-task icon to start mapping a randomly assigned task. Or, click on a blank grid cell (“available for mapping”) on the map similar as below as your targeted study area, then click Map-selected-task. Each grid cell can only be worked on by one person at a time, so that mapping efforts are not duplicated. It is important to follow the walkthrough tutorial to learn how to draw buildings & roads on the map, based on the reference satellite imagery.
Figure 2. HOT Project
You are taken to OSM editing page with the map zoomed to your chosen task (Figure 3). The extent of your task is marked by a hot pink boundary. You will only be mapping within the pink boundary. The background is a remotely sensed image of the area. You will use this imagery to mark the outlines of buildings or roads () within your task area.
Figure 3. OSM editing page focused on a HOT task.
Some task areas may not have any buildings or roads; if so, just select another task to work on. Some task areas may have already been finished by someone else; if so, check “Yes” for the question “Is this task completed mapped?” and select another task to work on.
You will need to draw at least 10 building features and 5 road segments in total. Ideally you can draw all the features within the same task area. If not, work on more than one task area to satisfy the requirement. For example, your general work flow will be like follows when drawing a building feature on the map:
Click the Area button from the top menu;
Click the outline of a building structure, and double-click for your final corner;
Identify the feature as a Building from the detail panel to the left;
Square up the building by right clicking on the polygon to see the options (unless it is a round or irregular-shaped building);
After drawing every feature, click the “Save” button, followed by the “Upload” button in details panel. Use your best knowledge to choose the specific building/road type or leave it as a general type if not sure.
Repeat the above step to create and upload at least 10 building features. Then, identify unmapped roads in the area, and draw at least 5 road segments. Two things to pay extra attention when drawing a road feature: road type and topology. After drawing a road segment (usually between two intersections), decide its road type. You can click next to a road type to see the definition. Also, make sure the end point of your road connects to an existing road or another road drawn by you (see Figure 9). Don’t forget to save and upload your work.
Figure 9. Draw a Road Feature
When you are done mapping, take screenshot(s) of the buildings and roads on the map, and paste them to your report. Don’t forget to submit your task.
Open a blank Word document and finish the following tasks or questions. Your report will be graded on accuracy, thoroughness, and effort. Formatting requirements: 12 pt. font, single-spacing. When you have completed the lab report, upload only the Word document to the class Canvas site.
Insert the screenshots in step 6 about the two differences you found on OSM and Google Maps. Briefly comment on each difference, i.e. which map is better when presenting the feature differently and why. (2 pts)
Insert the screenshots of the buildings and roads you contributed to the HOT project. Why is VGI or crowdsourced maps good option for such humanitarian mapping projects? Do you consider the data you create to be accurate? Why or why not? (> 300 words) (3 pts)