These residential areas look valid and the place in the NE is correctly mapped. Please take care to map as accuartely as you can; in some areas the residential areas you mapped overlap existing building footpritns. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171709386

You handled existing data well here by modifying it and making appropriate deletions. The residential area could ahve also included the buildingd to the SE. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171488392

You correctly mapped this settlement. Sometimes adding a few extra nodes at the sharp corners of a residential area can help you map it more accurately. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171497925

Hi, only one place node is necessary to represent a settlement. Consider which places might have a different name or are seperated by main highways or waterways. The likely residential area should be tagged with landuse=residential search for residential area in ID when tagging. Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171488809

Hi Andrew, Good job improving the accuracy of the two buildings in the SE and including the entirety of the building under construction in the NE (rather than just the roof. All building footprints you added here represent buildings visible in imagery however, the imagery allows them to be mapped more accurately; typically they are oversized or their shape should be more complex. See how I mapped some buildings you added here https://osmcha.org/changesets/171381560

It's much easier to map anything more complex than an L shaped building in JOSM, so mapping them with just a rectangle using ID is okay. I generally consider footprints that are equal to or smaller than the roof to be accurately sized.

When mapping buildings, please trace the shape accurately. Accurate building footpritns aid population estimates and prevent issues like data overlaps. Zoom in so that you can see the outline of the building and mark the corners carefully. Exclude shadows and yards when tracing the footprint. Keep in mind that you are looking at the roofs of buildings, but mapping their footprints. Depending on how the scene is lit, pitched roofs may have light and dark sections that belong to one building. Generally pitched roofs overhang the walls of a building, so a footprint slightly smaller than the roof is accurate. You can scale selected features in ID with shift+(-/+), or JOSM with ctrl.+alt+Lclick & drag. Take care to make contributions that others can build upon.

Please keep this feedback in mind when contributing in future.

Thanks for attending the mapathon today. This is a good contribuion overall. You even improved the accuracy of existing footprints! Some buildings have slightly more complex shapes like L or T. See most of the changse I made in this area here https://osmcha.org/changesets/171380006

Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
---
#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171378054

Hi, there are several mistakes in this changeset and some invalid data uploaded.

In short they are;
1. Poor building footprint accuracy
2. Waterway tagged as highway
3. Pond mapped as a building

I resolved these issues in changesets;
171341820
171341982
171341955

When mapping buildings, please trace the shape accurately. Accurate building footpritns aid population estimates and prevent issues like data overlaps. Zoom in so that you can see the outline of the building and mark the corners carefully. Exclude shadows and yards when tracing the footprint. Keep in mind that you are looking at the roofs of buildings, but mapping their footprints. Depending on how the scene is lit, pitched roofs may have light and dark sections that belong to one building. Generally pitched roofs overhang the walls of a building, so a footprint slightly smaller than the roof is accurate. You can scale selected features in ID with shift+(-/+), or JOSM with ctrl.+alt+Lclick & drag. Take care to make contributions that others can build upon.

when mapping highways and waterways check along them to identify what they are.

Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/

Why did you tag the highways in the way you did here? Particularly the Eastern and Southen one.
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Published using OSMCha: https://osmcha.org/changesets/171276697

Hi, why did you add a layer=2 tag to this highway? This appears to me to be an invalid use of the tag, so I have removed it in changeset/171339864. Please read layer=*

Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171277028

I resolved this by deleting these footprints, while preserving the older ones.
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171060796

Hi it looks like you duplicated footprints by mapping new ones on top of existing ones. If you want to improve the existing data then please modify it instead of deleting or re-mapping. Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171060796

Hi, you mapped a waterway/highway crossing as both a bridge and a culvert (Jalan Pemuda/Kali Mapuruka). Usually in OSM (though it can be difficult to identify) it is one or the other. If you had to choose would you say that this is a bridge or culvert?

The footprint I flagged envelopes multiple buildings. Each footprint should represent one building. Use shadows and colors to determine when one building ends and another begins. Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
---
#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171068840

Welcome to OSM and thank you for your contribution!

You identified buildings in the imagery.

Sometimes you enveloped multiple buildings in a single footprint; each footprint should represent one building. Use colours and shadows to deternine where one building ends and another begins.

While it's good that you're trying to be efficient, you inappropriately copy and pasted building footprints here i.e. the copied footprints did not accurately represent buildings visible in the imagery. One of the best ways to be efficient is to make high quality contributions; that way the data won't need to change unless the ground truth does.

When mapping buildings, please trace the shape accurately. Accurate building footpritns aid population estimates and prevent issues like data overlaps. Zoom in so that you can see the outline of the building and mark the corners carefully. Exclude shadows and yards when tracing the footprint. Keep in mind that you are looking at the roofs of buildings, but mapping their footprints. Depending on how the scene is lit, pitched roofs may have light and dark sections that belong to one building. Generally pitched roofs overhang the walls of a building, so a footprint slightly smaller than the roof is accurate. You can scale selected features in ID with shift+(-/+), or JOSM with ctrl.+alt+Lclick & drag. Take care to make contributions that others can build upon.

Please do not connect the corners of buildings to other buildings or features such as highways or residential areas. In the iD Editor, hold down the `Alt` key to prevent your cursor from snapping to existing data and accidentally creating shared(grey) nodes. This [video about connected nodes](https://youtu.be/ltn1VOiq5_0) has more information and a guide.

After tracing and tagging features which are likely square or round, please remember to square their corners (q), or circularise them (o), because it is almost impossible and time consuming to draw shapes so percisely by hand. Buildings with metal or pitched roofs tend to have square corners; round buildings are identifiable by the distinctive cresent shaped shadow they cast. Unless the building is clearly a different shape then it's best to assume that it should be rounded or its corners should be squared. In the iD Editor, you can right click for access to editing functions. Since roofs tend to overhang walls trace the initial shape slightly smaller to allow a buffer for any change in size that may occur. In JOSM use the [buildingstools plugin](osm.wiki/JOSM/Plugins/BuildingsTools). In ID you must draw the shape accurately enough else shapes will not completely square. This [video about squaring features in ID](https://youtu.be/Xs5wX592E1o) has more information and a demo.

Keep on mapping!

Welcome to OSM and thank you for your contribution!

You identified buildings in the imagery.

While it's good that you're trying to be efficient, you inappropriately copy and pasted building footprints here i.e. the copied footprints did not accurately represent buildings visible in the imagery. One of the best ways to be efficient is to make high quality contributions; that way the data won't need to change unless the ground truth does.
When mapping buildings, please trace the shape accurately. Accurate building footpritns aid population estimates and prevent issues like data overlaps. Zoom in so that you can see the outline of the building and mark the corners carefully. Exclude shadows and yards when tracing the footprint. Keep in mind that you are looking at the roofs of buildings, but mapping their footprints. Depending on how the scene is lit, pitched roofs may have light and dark sections that belong to one building. Generally pitched roofs overhang the walls of a building, so a footprint slightly smaller than the roof is accurate. You can scale selected features in ID with shift+(-/+), or JOSM with ctrl.+alt+Lclick & drag. Take care to make contributions that others can build upon.

Please do not connect the corners of buildings to other buildings or features such as highways or residential areas. In the iD Editor, hold down the `Alt` key to prevent your cursor from snapping to existing data and accidentally creating shared(grey) nodes. This [video about connected nodes](https://youtu.be/ltn1VOiq5_0) has more information and a guide.

After tracing and tagging features which are likely square or round, please remember to square their corners (q), or circularise them (o), because it is almost impossible and time consuming to draw shapes so percisely by hand. Buildings with metal or pitched roofs tend to have square corners; round buildings are identifiable by the distinctive cresent shaped shadow they cast. Unless the building is clearly a different shape then it's best to assume that it should be rounded or its corners should be squared. In the iD Editor, you can right click for access to editing functions. Since roofs tend to overhang walls trace the initial shape slightly smaller to allow a buffer for any change in size that may occur. In JOSM use the [buildingstools plugin](osm.wiki/JOSM/Plugins/BuildingsTools). In ID you must draw the shape accurately enough else shapes will not completely square. This [video about squaring features in ID](https://youtu.be/Xs5wX592E1o) has more information and a demo.

Keep on mapping!

Hi, the vast majority of buildings you added here are valid and represent those visible in imagery, however they could be more accurate as they are generally oversized and could be more accurately positioned relative to one another.

When mapping buildings, please trace the shape accurately. Accurate building footpritns aid population estimates and prevent issues like data overlaps. Zoom in so that you can see the outline of the building and mark the corners carefully. Exclude shadows and yards when tracing the footprint. Keep in mind that you are looking at the roofs of buildings, but mapping their footprints. Depending on how the scene is lit, pitched roofs may have light and dark sections that belong to one building. Generally pitched roofs overhang the walls of a building, so a footprint slightly smaller than the roof is accurate. You can scale selected features in ID with shift+(-/+), or JOSM with ctrl.+alt+Lclick & drag. Take care to make contributions that others can build upon.

Sometimes it looks like you included a building's walls in its size and shape. Look to the SE at the taller buildings to more easily see which walls of buildings are visible in imagery.

Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/

Awesome! You're most welcome! I corrected the postion of one of the footprints you added here. You can check the following link to see various changesets I uploaded where I mentioned nadir in the comment for examples of how I mapped using off-nadir imagery. Beware of the imagery that was used for the mapping. Sometimes offsets may have been applied which; in cases like this you're unlikely to immediately see the footprints in the correct position just by loading the imagery. https://osmcha.org/changesets/170897311?filters=%7B%22uids%22%3A%5B%7B%22label%22%3A%2216598557%22%2C%22value%22%3A%2216598557%22%7D%5D%2C%22date__gte%22%3A%5B%7B%22label%22%3A%22%22%2C%22value%22%3A%22%22%7D%5D%2C%22comment%22%3A%5B%7B%22label%22%3A%22nadir%22%2C%22value%22%3A%22nadir%22%7D%5D%7D

Hi, this is certainly a more difficult situation and took me a short while to figure out, but I think that you mapped roof furniture (like building parts, HVAC systems, or walls etc.) here instead of the buildings' footprints themselves. I can see why it might be confusing, becasue some of the roofs have walls on some edges making buildings difficult to differentiate from yards in ESRI. When mapping compounds it can be accurate to map the individual buildings and walls connecting/enveloping them.

If you haven't done so already look at bing imagery in this area to aid your interpretation. I put the primary source in the first layer and use the alt+number shortcuts to toggle supporting layers to aid my interpretation.

I also viewed mapillary street level imagery to better understand the context and I recommend you do so too. Check out the more complex roof geometries/furniture and how they compare to the footprint. This should also further convince you to map footprints slightly smaller than what you see in imagery when you see how the roofs overhang the footprins of buildings at ground level.

See how I mapped this here https://osmcha.org/changesets/171160875

Please keep this feedback in mind when contributing in future. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/

Hi Rabina, I'm not sure why you requested a review of this changeset, but the footprints to me look valid though they could be more accurate. See how I mapped this here https://osmcha.org/changesets/171160504

I expanded the NW footprint to its south after cross referencing bing imagery. Map it how you think is most likely in reality and if you really cannot tell then map features assuming them to be seperate to make surveys easier.

I then uploaded that change extending the footprint here https://osmcha.org/changesets/171160596
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#REVIEWED_GOOD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/171091745

I resolved the overlapping and duplicated data with https://osmcha.org/changesets/171107943
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/170271278