OpenStreetMap

Mapping Gqeberha - Part 02

Posted by GovernorKeagan on 7 April 2024 in English.

Overview

Progress has been solid over the past week. My main focus is still trying to add in as many missing buildings as possible, but I’ve covered the following during the week:

  • Micromapping. While fixing two schools and two shopping centres, I decided to micromap them using a combination of aerial imagery and my local knowledge.

  • More buildings. I’m still just trying to “fill in the blanks” and get buildings added.

  • Small fixes. While doing other mapping, I came across various small issues that I fixed at the same time.

Micromapping

Schools

While updating some details for Victoria Park High School & Victoria Park Primary School, I decided to micromap them while fixing some misalignments. I tried to map in a way that makes sense and not just to make it look pretty on the renderer.

While doing this, I noticed that the park next to the High School had some seemingly strange boundaries. I need to do some more research to confirm where the park boundaries lie, so for now it remains the same.

Shopping Centres

Similar to how I started with the schools, I wanted to correct some details and fix some “wonky” mapping from older imagery. I ended up doing some pretty detailed micromapping except for changing some shop details - I know that they aren’t there any more, but I don’t have the current shop details at the moment.

More Buildings

I’m very happy with the progress that I’ve made. It’s slow at times, but it is moving and I can see the difference. There has been a decent amount of properties that had a node with address but no area mapped for the building. This has come in handy once or twice where I could verify the building to ensure that it is still there, which wasn’t always the case.

Having said that, it would still be great for a local to confirm all of this, there’s only so much I can do from Ireland.

Small Fixes

While doing other mapping tasks, I have tried to correct any other issues at the same time. Generally, this has been correcting some wonky alignment of roads. It’s easier to fix these things at the moment then trying to go back and fix a larger issue.

General Observations

Just a couple of things I’ve noticed while working on this project.

  1. I mentioned this already, but I’ve come across a good number of buildings that have only had an address node over the building (without any area mapped).

  2. I noticed that someone had micromapped some residential properties. While I’m all for micromapping (I did a decent amount this week), adding trees to someone’s back garden seems a little strange.

  3. The satellite imagery is really good! I would love it if Ireland had the same high quality imagery.

  4. There is next to no landuse=residential or landuse=retail mapping. While I’m 90% sure of what is a business and what is a residential property, a lot has changed in the almost 6 years since I was last in South Africa. I’ve added a little, but for the most part I’ll leave it for a local.


Before:

Start of the week before I started mapping.

After:

Progress as of the 7th of April (1 week of mapping)

Before: Victoria Park High School

The main buildings were mapped already, but they lacked detail.

After: Victoria Park High School

Details added, as well as some micromapping.

Before: Victoria Park Primary School

Similar story to the above.

After: Victoria Park Primary School

Details added, as well as some micromapping.

Location: Nelson Mandela Bay Ward 3, Gqeberha, Nelson Mandela Bay Metropolitan Municipality, Eastern Cape, South Africa

Discussion

Comment from googlenaut on 19 April 2024 at 10:00

Done something similiar with cities and rural settlements in NorthWest. Most recently Potchefstroom. Before there was only some highways.

Comment from GovernorKeagan on 19 April 2024 at 13:22

@googlenaut It’s a fun project to work on for sure. I’ll probably move onto the surrounding cities/towns when I’m finished here.

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