Questions tagged [streets]

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

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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 ...
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 ...
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 ...
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 ...
0
votes
1answer
200 views

Cleaning up Line Features

I'm in the process of creating some routes for which I need left and right sections. I have an original streets feature class, which I used "copy parallels" on, and came up with something like the ...
1
vote
1answer
315 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 ...
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 ...
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 ...
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
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?
3
votes
2answers
499 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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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....