Questions tagged [streets]

Identifies questions specific to streets, such as street drainage, identifying centerlines, and creating travel networks.

Filter by
Sorted by
Tagged with
28
votes
7answers
18k views

Methodology for creating accurate drainage networks (and catchments) from high resolution LiDAR DEM?

This is not the first time I've stumbled over this issue; it seems that I am unable to generate a correct drainage network model and the resulting catchments from full resolution (1m cells) LiDAR data....
18
votes
3answers
2k views

Account for bridge overpasses in a ground DEM to allow for water flow under the overpass

I have a bare earth DEM made from lidar data (A). It works well and has passed all accuracy tests. It is used in storm surge models. The problem we are having is on underpasses. I need to allow water ...
12
votes
2answers
4k views

Grouping connected linestrings in PostGIS?

I have a table of streets I've selected based on a set of attributes (let's say it's speed_limit < 25). There are groups of streets that are locally contiguous; I'd like to group these sets of ...
10
votes
2answers
2k views

Cutting linestrings with points?

I was checking the best way to cut linestrings by points. The scenario is: lots of streets, need the segments cut by intersect points, kind of this: I got linestrings (full uncuted by points) ...
8
votes
1answer
572 views

How to transform a set of street-segments into city-blocks, with PostGIS2?

Theoretically is possible to obtain the polygons of city blocks (urban blocks) from streets, when streets are represented by street axis (LineStrings). The urban blocks are bounded by streets, so ...
7
votes
2answers
2k views

Easiest way to create historical street maps using QGIS

I want to make some historical street maps using QGIS. I understand how to upload a historical OS map from DigiMaps to QGIS, but I want to actually 'draw' the streets myself in order to have some ...
5
votes
7answers
2k views

Assigning centerline address ranges

I've been given the task of assigning address ranges to a centerline feature class. I have all the data and I am just going street by street. My question: When assigning ranges, should I just enter ...
5
votes
2answers
130 views

Compare slopes between adjoining line segments

Using a DEM, I assigned slope values to individual segments in a street network feature class. In some areas the slope values seem suspect, such as where a highway overpasses a local road. Is there a ...
5
votes
1answer
221 views

Detect whether polygons are on one side or both sides of the road center line?

I have two tables in my PostgreSQL 9.5 database i.e., roads and polygons. The sample scenarios are as: Scenario_1: Scenario_2 In PostGIS, for each road how can I detect whether polygons are one ...
4
votes
2answers
6k views

OSM - Extract Streets from OSM Data (With/Without Python)

I'm currently in the works of creating a pythonic way of extracting street names from an OSM dump for the Province of Quebec. Originally, I wanted to do this in Python to make it easier to integrate ...
4
votes
2answers
995 views

Road segments reconstruction from GPS trajectories [duplicate]

We have a 10,000 base of vehicle mounted moving devices which report their GPS position on a time based schedule. All that data is currently being stored in our database for several business related ...
4
votes
0answers
131 views

Resources for creating a matrix of relationships between street segments

We are looking at examining traffic in a city using data coded to TMCs (which are long directional links, primarily major arterials and highways, where each link is the length of multiple blocks). In ...
4
votes
2answers
601 views

How to simplify streets such that seperate driving tracks are reduced?

Streets in Openstreetmap have more detail than I need. For instance I do not need seperate street tracks for each driving direction, instead I just want to show the general path of the street. Example:...
3
votes
1answer
371 views

Network Analysis PyQgis 3.0

I've been trying to build a graph from a projected (EPSG 27700) clean (no pseudo-nodes) street network. I followed the tutorial here presented employing the QGIS 3.0 functions; now the network ...
3
votes
2answers
1k views

What are the types of bus routes data, which are made available from Open Street Map (OSM)?

With regards to bus routes, what are the types of data which are made available for download. Is it possible to export a region's bus routes in open street map (OSM) or GIS data format?
3
votes
2answers
498 views

How to map Traffic Count Points to Streets?

I've got point data representing traffic count locations and I am trying to figure out the best way to represent them on a map.I thought about kriging to provide a continuous surface but I don't think ...
3
votes
2answers
1k views

is there a public street database that I can do SQL queries on?

Sorry if this isn't strictly a GIS question. I want to know if there's a public database of US streets and US States that I can simply connect to (e.g. JDBC) and run SQL queries. For example, I want ...
3
votes
1answer
301 views

How do I remove roads classified as residential from an OSM slippy map?

I'm developing an application in which I need to have an underlying graph representation of streets. Google Maps does not provide this data, which is why I decided to use OpenStreetMap. I have ...
3
votes
1answer
242 views

What determines direction in “Hatches”?

I created a route layer that uses hatches to help determine addresses along a street centerline. About 90% of the time, the hatches go up from zero in the direction that the line was digitized but ...
3
votes
0answers
33 views

Using ST_Union vs ST_Node?

My question follows from Splitting Streets to Create Polygons? I was able to successfully convert a layer of linestrings to polygons based on line intersections with the query given in the answer. ...
3
votes
0answers
194 views

Positional accuracy assessment methods in qgis

I'm doing an quality assessment of openstreetmap's street data. As a comparism dataset I have to use an administrative dataset, which is highly accurate and comes in polygons. Here's a sneak peek: So ...
3
votes
0answers
55 views

How do map providers collect/update street names in the Middle East? [closed]

Spatial data in Middle eastern countries, is not as comprehensive as it is in European countries or the United States. How do map providers/producers get street names, update new areas and all of ...
3
votes
0answers
857 views

Using Element Properties with ArcGIS Report Designer? [closed]

I've finally got a table generated that will work for a street index and I'm attempting to use the ‘Create Report’ tool with ArcGIS 10.1 to generate what I need for a map. Essentially, I have it setup ...
2
votes
5answers
8k views

Calculating Slope of Street Segments using ArcGIS Desktop?

Using a DEM, I need to assign slope to individual segments in a street centerline feature class. It will be used to account for increased travel time for steep slopes in a network analysis. I am ...
2
votes
1answer
178 views

How to attribute street name to its adjacent sidewalk

I have two shapefiles one with street centrelines and the othe With sidewalk asset information.The sidewalks were digitized continuously around the block unlike the streets. I tried to do a one to ...
2
votes
1answer
71 views

Intersection Type Data

Would anyone have any input as to where I could find a table/shapefile/feature class that describes the intersection type of roads? I've looked into TIGER roads, StreetMap premium, OpenStreetMap ...
2
votes
1answer
277 views

House numbers on roads layer

I have a problem regarding the street numbers in OpenStreetMap. I have downloaded the .osm file of a city from the OpenStreetMap web. Then with QGIS I have obtained a shapefile with roads and a ...
2
votes
2answers
79 views

Mapping Points to streets

I am new to the GIS-World and just learned a couple of tools. Now I want to start with my actual project, but since i don't have a overall understanding I would have to hear your opinions about the ...
2
votes
2answers
125 views

How to find if a lat/lon point is on a street?

Are there any services to determine whether or not a give lat/lon point is on a street? I am working on an app that uses user entered lat/lon points but it only really makes sense if its on a street. ...
2
votes
1answer
398 views

Merging and snapping Tiger line files

I have several adjacent (county level) TIGER road files. I want to merge them and create one contiguous file of snapped roads for the purpose of doing network analysis. Merging them is easy but ...
2
votes
0answers
61 views

Specifying polygon face toward two different lines using ArcMap?

I have a parcel layer, a street of city layer, and I want to find the parcels at the corner of two different streets (meaning a house with two faces toward 2 streets). I am using ArcMap. I want ...
2
votes
0answers
52 views

How do I get a count of all the dead end streets? [duplicate]

I'm working in ArcGis 10.1 - Advanced and I wanted to know how can I identify and get a count of the number of dead end streets in my road network?
1
vote
2answers
1k views

How can I get all streets width of Paris

I'm trying to query OpenStreetMap via QGIS (for example) to get a list of all streets in Paris and their width. example : Boulevard Sebastopol : 30m Rue Tiquetonne : 11m etc Is there such data in ...
1
vote
1answer
136 views

Overlaying two vector shapefiles on a basemap results in a misalignment

I have been trying to overlay two shapefiles of the Harare Zimbabwe streetmap one with centerlines and the other digitized as polygons. the challenge i am facing is that the two overlay but not on the ...
1
vote
3answers
521 views

Split polygon based on line segment

I am trying to split a street polygon based on the segment ID of the street, giving them the same segment_ID in the attribute table of the street lines. I did not use the line feature class to derive ...
1
vote
1answer
164 views

Can I create a polyline with one long segment and three shorter underlying segments?

We currently have a street centerline polyline feature class where the street segments correspond to our pavement management database. Each segment has a unique ID that matches a record tracking ...
1
vote
2answers
983 views

How to calculate miles of road in street network

I have a road network we use for our city. It has ever single road created and categorized. What would I do if I wanted to calculate the total miles of roads in this network?
1
vote
1answer
47 views

US Census roads - names of overlapping street segments

I'm working with recent Census (TIGER) road files in ArcGIS 10.5 / ArcPy (Advanced license). I want to get the road name(s) of the closest road segment (between intersections) to a point. Roads in ...
1
vote
1answer
161 views

Name of Round road in Center of Amritsar, India?

New Info I just found out this area used to be a wall with 12 gates. Portions of the wall are still there. Still researching name of roads, or portions of the road, such as Bazaar Rd on South-West ...
1
vote
1answer
653 views

Geocoding Street Segments Based on Extents in ArcGIS for Desktop?

I have a list of projects that need to be geocoded or drawn through some sort of automated process in ArcGIS 10.3 for Desktop. The are listed by primary street, a begin street intersection, and an end ...
1
vote
1answer
665 views

How to get all the LineStrings of a street using PostGIS with OSM

I want to get all parts of a given street. I use a query like: Select * from planet_osm_lines where name = 'mystreet' As a result I get all the LineStrings that are part of a street with the ...
1
vote
1answer
817 views

What can I do in Mapbox Studio with the osm_id number for #buildings from Mapbox Streets?

My goal is to use OpenStreetMap buildings data to create map tiles that show buildings styled with information such as name, floors, and other information from the tags associated with the way/feature ...
1
vote
1answer
1k views

Where to find street names for each city in US?

I'm sorry if my question is stupid but I had to ask. I'm building a database of US states, cities, streets AND their basic relations to each other. I already have state and city tables. Where can I ...
1
vote
1answer
312 views

Creating a list of unique street names from a list of address

I would like to generate a unique list of street names from a list of UK addresses, but obviously there will be a number of streets with the same name. I want to distinguish between streets that are ...
1
vote
1answer
100 views

Google Streets XML as raster layer

I found Why are the Google basemaps no longer appearing in QGIS? which explains a simple method to reach the google tile server and get the Google Physical tiles. Has anyone a similar code with which ...
1
vote
0answers
36 views

Coding streets in ArcGIS? [closed]

Can you provide me a little know-how of how you could code your streets as shown in the figure. Initial class is assigned as A,B,C... and when certain street(say A) branches, it is coded , as A1, A2 ...
1
vote
0answers
61 views

Can I retrieve google map data for traffic and whose the users?

Can I retrieve Google map data for traffic on a specific street? Does the the data include attributes about the users who are creating the traffic (users age in the traffic, gender, etc.)?
1
vote
0answers
12 views

Standard Format for Underpass Clearance? [closed]

Do highway departments typically provide underpass clearance data as part of data sets provided to google maps, et. al.? If so, can anybody point me at the definition of the data elements, file ...
1
vote
0answers
49 views

Automatically selecting street segments from address list? [closed]

I browsed around this site and a couples of other QGIS sites, and couldn't find solutions to my problems. However, I'm quite new to QGIS, so my question is possibly pretty naive. I need to create ...
1
vote
0answers
95 views

ArcGIS Intersect not showing on all street intersections

I have a centerline shapefile and have extracted a lane way feature class from it as I am attempting to show all intersections where these lane ways cross with public roads. I utilized the intersect ...