I have vector map tiles of North America, split into us-west, us-midwest, us-south, us-northeast, us-pacific, canada, and mexico (no Greenland). They are comprised of contour lines of every 10 meters. I also have a Mapbox style (modified from OSM Bright) that shows them on a regular map. They are available for zoom levels 0 to 14 (although some are only 8+).

I made the dataset for a personal project, and it seems there is no good free source for this data.

Basically it's the same as this data except it doesn't cost over $900. If you pair it with this data and tileserver-gl, you get a nice topographic map of North America.

Preview of data and custom style

Files:

21G   canada.mbtiles
4.1G  mexico.mbtiles
46G   north-america.mbtiles
21G   us.mbtiles
1.4G  us-midwest.mbtiles
693M  us-northeast.mbtiles
5.4G  us-pacific.mbtiles
2.1G  us-south.mbtiles
12G   us-west.mbtiles

I hope this will serve as an active, intelligent community where cartographers, GIScientists, and map designers can create and collaborate. Submit your project idea and enlist the help of redditors to help map the world!

I am a student in GIS and working on a project to map the tree coverage along streets. I want to find the street tree coverage for census tracts and then compare it to median household income to determine if there is a correlation between the two. The idea is to measure the tree coverage (the area) along streets because this tree coverage has its own unique benefits compared to tree coverage in parks. I don't want park trees or those on private property to skew the results. I am struggling to wrap my head around how to go about this kind of analysis. I want to do this analysis for the city of Philadelphia so I have a large area to cover. I have a land use raster that shows tree coverage and streets among other things. Initially, I thought about separating the tree coverage and turning that into a polygon feature class. I have a street centerline feature class as well and thought I might be able to buffer the streets so that they cover the sidewalks and measure the tree coverage within those buffer zones. I realize this wouldn't be a very accurate way of measuring since street and sidewalk widths can vary a lot. I considered creating a polygon from the street raster and then buffering that by a certain distance (to include the sidewalk). But there would be gaps in the street where the tree raster overlaps the street so that would be excluding the very area I need to measure. Ideally I would like to create a polygon that includes the entire width of the street as well as the sidewalk that runs next to it (but not all paved areas that aren't along the street). I don't know if there is a way to isolate this.

After obtaining the tree coverage contained within the street and sidewalk I would like to break this down by census tracts so I can see whether there is a correlation between street tree coverage and median household income. I am not sure how this would break down along census tract borders which run through the middle of the street. Does anyone know about a better way to go about this? I am using ArcGIS 10.3. I saw that there are tools available for measuring street tree inventory but I think this is only available for ArcGIS Pro. I would greatly appreciate any suggestions. I like this project idea but I'm struggling to know how to go about it.

There's a tendency for 'historic estates' in the American South to gloss over their central roles in slavery, so it's difficult to know which estates actually employed slaves in the past. Does anyone know of datasets with this info?

Hi,

I’m working on a project to help inform an ordinance to register vacant properties. I want to show the correlation between vacancy and municipal resources being spent on those properties in the form of 911 calls and mowing and other expenses.

I have geocoded points of electric meter disconnects as a proxy for vacant properties.

I have geocoded tables of dispatch data, showing addresses or streets or intersections from which someone called 911.

How do I best visualize the correlation between these data?

What I have done so far:

1. Generate a tessellation

2. Count the vacancy points in each hexagon and visualize the symbology for darker hexagons with more disconnected meters

3. Symbolize the 911 geocoded points as a heatmap

4. Toy with transparency and colors of the heatmap and tessellated vacancy hexagon layers

I am wondering if there is a better way to visually represent the correlation between density of vacant properties and density of 911 calls. I can see that they already do correspond but I’m just not quite satisfied with the way it looks, and wonder if I’m missing out on something. What about blending layers? Something else?

Interested in your thoughts. Thanks!

Looking for help w/ interactive map to teach new Firefighters street names. Ideally a blank street map that you can click on streets and fill in correct name. Does anyone have any guidance because I can’t seem to find an existing model like this. Thanks.

Hello. My GIS skills are rudimentary at best (spent 1 semester learning ArcGIS Online through web tutorials/pdfs) and I am taking more GIS classes this coming spring semester. I have just installed QGIS to get my feet more wet, but since I already know the basics of ArcGIS Online I have signed up for an internship at the park I work at and was wondering if someone could point me in the right direction in terms of where to find the data I am looking for.

I am trying to do a coastal erosion change analysis by georeferenceing a group of points along the shore of the lake front Park and find out the change in erosion and deposition over the course of ~20 years. Basically, I need aerial images for this small part of land off the coast of Lake Erie as well as elevation data. Their beach has been slowly eaten away by the lake and my goal here is to quantify and report the erosion/deposition that is occurring. I apologize of I sound like a huge noob, trying to use all the resources I can before I get going on it. My academic advisor will be out of the office for a portion of the semester so his help will be limited on my end, and the park seems super lenient in terms of what they want so I am feeling a little lost. Thanks in advanced

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