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Questions tagged [stream]

The tag has no usage guidance.

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0answers
28 views

Preserving Geometry of Shape file after merging edges using Networkx

I have a stream network and I want it to convert in a graph like data structure having vertices with only degree 1 and 3. The degree of the vertex is the number of edges incident to that vertex. The ...
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0answers
22 views

Split line layer by another line layer

I have two line layers . One is the stream network (dissolved) and other is the point layer converted to line layer by converting each point into short line segments. I am using "Split by lines" tool ...
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2answers
49 views

Creating contours based on polyline using ArcMap?

I would like to create a simple floodplain map. I have LiDAR data with 1 meter accuracy. I have clipped it to a small area of interest that my computer can handle processing the LiDAR. I want to ...
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0answers
40 views

Merging Degree Two nodes in Stream Network using QGIS 3.4

I have a stream network and I want to convert it in graph like data structure, for which I need to have precise set of FROM and TO vertices.The geometry of stream network is not correct i.e. the ...
2
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0answers
38 views

Finding Intersection Points in Stream Network using QGIS?

I have a stream network and I want to find the red points as shown below. I have tried using Q-chainage and Line Intersection feature in QGIS but it gives more than expected number of points. The red ...
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0answers
29 views

ArcGIS stream ordering

I am trying to find morphometric indexes, but stream order result shows that my highest stream order have 333 number of stream. But in theoretically, number of stream of highest stream order equal to ...
0
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1answer
44 views

Continuous buffer from individual polygons in QGIS

I have a stream segment for which I am trying to find a buffer around with criteria as 5m of elevation. So for each straight line within a stream segment, I have found buffer (polygon) for it. Now I ...
0
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1answer
25 views

Estimate total stream length, frequency and order in ArcMap [closed]

I am new to GIS, and I want to calculate the stream frequency and Strahler stream order in a watershed. I have already processed the DEM and there are 20 sub basins. A sample map what I want to get is ...
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0answers
34 views

Howerive vector stream network from a DEM using D-Infinity Flow Direction algorithm?

I have been working with a 1m LiDAR derived DEM to create a vector stream network. Using the D8 flow direction, D8 flow accumulation, and a specified threshold, I was able to create a vector stream ...
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0answers
29 views

Quantitatively evaluating quality of watershed delineation stream line results?

How can we quantitatively describe the quality of watershed delineation? What metrics can I use to compare the stream line differences between a few delineations using different DEMs with different ...
1
vote
1answer
66 views

Find higher elevation (10m) perpendicular point from stream network at regular interval

I have a stream network and for that network, I want to find the points at regular intervals which lie at 10m distance perpendicular from the stream.The final goal is to find the buffer of that 10m ...
1
vote
1answer
44 views

Reading RINEX formatted streams

I'm playing around with a public NTRIP caster but I'm very new to all this. I'm using BKG Ntrip Client to read the stream and the file I get has around 45 lines for each sample. Each line begins with ...
5
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1answer
157 views

QGIS: Edit elevation in DTM to get correct slope of a river

I am new to QGIS and just need it to do a hydrolocic analysis of an area of which I later make a flow model with HEC-RAS 2D. I made it according to this tutorial: https://www.youtube.com/watch?v=Ro-...
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0answers
36 views

Determining if Runoff Sinks drain to stream or drain to road?

I've tried using the linked method to determine area that drains to stream vs drains to road. For some reason when I run the watershed tool on the the raster representing stream and road features, I ...
2
votes
1answer
80 views

WMTS Grid Streaming using QGIS?

I've got a WMTS service that work well, but I would like to display a grid in qgis over it with X, Y, Z information how may I do that ? If QGis can't generate it for us, how may I generate this kind ...
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0answers
185 views

Can I stream GeoJSON data in openlayers, using Angular6+

I am using angular 6 and openlayers 5. Angular 6 combined with RxJS can easily create streams. I was thinking to use RxJS streams in order to feed GeoJSON data to ol5 vector layers. Why? Because ...