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Questions tagged [overlay]

A spatial operation in which two or more maps or layers registered to a common coordinate system are superimposed, either digitally or on a transparent material, for the purpose of showing the relationships between features that occupy the same geographic space.

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Does geopandas overlay use spatial indexing

I have a general question about geopandas overlay method. I want to know whether it already uses spatial indexing or not. If not, how would I apply indexing? Background I do an intersection with ...
tetje's user avatar
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20 views

Overlay TIFF raster and "Shape" file a free library in C#?

Is there any free C# library to get the elevation data for the vertices of a 2D line feature Shape file form a raster tiff file? The "Elevation" column in the attribute table of "...
NewbieInCSharp's user avatar
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31 views

"Extract by Expression" works manually, but not in model [duplicate]

I have a QGIS project (v 3.34.0) where I run a model to calculate distances from all building facades to the nearest road. The last step in the model is to extract only those line features (the ...
mtwente's user avatar
0 votes
1 answer
69 views

Eliminate any pixel of a GeoTIFF that does not intersect with the geometry/feature in OpenLayers?

As shown in the below posted code, I am trying to overlay particular geomerty/feature with a GeoTIFF, the code posted below succeeded in achieving that. However, as shown in the below posted screen-...
Amr's user avatar
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27 views

How to sum assigned scores of multiple rasters into an output raster in Raster Calculator

I'm using ArcGIS Pro. I have multiple rasters, each representing a water quality characteristic. I assigned a score for each characteristic. A couple rasters have different scores. I want to overlay ...
meich's user avatar
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0 votes
1 answer
61 views

Overlay problem when importing a CSV file into QGIS

I'm having a problem with certain entities being superimposed when importing a delimited text file in .csv format into QGIS. It seems that some entities lose their coordinates and copy the coordinates ...
elia's user avatar
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1 vote
0 answers
21 views

Potential surface water based on slope degrees - QGIS

I have two sets of raster data that I would like to combine but under a condition. I have derived a slope raster from my DEM, and I have already classified it based on slope values in my AOI (degrees) ...
Timvdhilst's user avatar
1 vote
0 answers
56 views

Overlay TIFF with raster layer

I am using QGIS 3.23.3-Lima. Input files TIFF: 12 TIFF files with species abundance data (output of a species distribution model) Input file shape: Esri shapefile with the 12 biogeorgions. Aim: One ...
Sibylle Stöckli's user avatar
0 votes
1 answer
82 views

GeoDataFrame.overlay parallelization with multiprocessing

I'm trying to speed up the calculation of the intersection between two geodataframes with multiprocessing. I'm using GeoPandas with JupyterLab from Anaconda on Linux. My multiprocessing code currently ...
banana store's user avatar
0 votes
1 answer
70 views

How to obtain superimposed colors from 3 raster RGB in QGIS

I have 3 separate raster layers with binary values (1/0). By assigning the 3 primary RGB colors to each of the layers, I would like to obtain a representation that expresses the overlap of the layers ...
Peter J.'s user avatar
1 vote
1 answer
50 views

What is the right way to dissolve vector features in GRASS GIS on attribute values of one column summarizing or averaging others?

The line product of v.overlay contains a column with zones number and a stack of other attributes. What I want: Dissolve features (lines) on attribute column that contains zones number. Other ...
Nikolay Yasinskiy's user avatar
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98 views

Python Geopandas: Dissolve function does not dissolve overlapping polygons

I have developed a Python program using GeoPandas to handle overlapping polygons. The program first dissolves these overlapping polygons and then applies an overlay operation (specifically, ...
user2293224's user avatar
1 vote
1 answer
67 views

How to select lines/edges that overlap with a line layer in QGIS

I am calculating the shortest path in QGIS using the openrouteservice API. From the returned route, I would like to calculate the length of segments that are paved and those that are not paved. Since ...
Faustin Gashakamba's user avatar
1 vote
0 answers
114 views

Overlay shapefile boundaries on geom_tile heat map in R

I have a square matrix which corresponds to a square area of a map. The values represent the mean value of any centroids in the relevant grid square. I am visualising this using geom_tile in ggplot. ...
hwk2000's user avatar
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96 views

Combining bounding box with xy coordinates in R

I am just beginning a side project to start learning something about spatial analysis using data from match play events in a particular sport. I have some xy coordinates of shots taken at goal and in ...
Eccles's user avatar
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17 views

Is it possible to split a polygon-subwatershed with a gage point without v.overlay?

After creating a clean map of subwatersheds I want to split some where control gages are located. If I try to do this with v.overlay (AND) - clipping subwatersheds previously generated with r.basins ...
Nikolay Yasinskiy's user avatar
1 vote
1 answer
92 views

Creating raster layer with pixel values which are sum of overlapping polygons in single vector layer

I am using QGIS. I have a vector layer with about 600,000 overlapping polygons, each with an assigned risk value as attribute. I want to create a raster layer which shows the total risk value at each ...
I'm not a robot's user avatar
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0 answers
67 views

Image Overlay for Classified Images

I created 5 classified images for year 2019-2023 as shown: - Fig: Classified image of Sentinel-2 for 2019 I have also prepared the classified image for 2020, 2021, 2022, 2023 like above. The ...
Pushkar's user avatar
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1 answer
76 views

PyQGIS: .disjoint() and .equals() do not work

I have to clean a data set for research. It is just one layer, but I need to remove features that are registered several times or have a geometry that is somehow faulty. The dataset is too large to do ...
Homerun_'s user avatar
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2 votes
1 answer
163 views

QGIS Overlay analysis in field calculator

I have a polygon layer in QGIS 3.32.2 which I want to clean for later analysis. There should be no polygons that share any area at all, but they would touch quite frequently. However, the polygon ...
Homerun_'s user avatar
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1 vote
1 answer
57 views

Set Operation `intersection` and return only one gdf

I would like to find all polygons that intersect and return the original polygons; not the intersection. Lets go with the set operation example from shapely.geometry import Polygon polys1 = geopandas....
arkriger's user avatar
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4 votes
1 answer
148 views

Merging two shapefiles to show boundaries

I need to draw both maps but only show boundaries for the region (blue map) over the district map (maroon). How do I do that without putting regions on top and changing opacity because the opacity ...
uganerd's user avatar
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0 votes
1 answer
110 views

QGIS value relation dropdown filter by overlay_nearest

I have in QGIS 3.28.8 two point layers: source_p and target_p I want in source_p layer to create a dropdown to "TargetFID" field with Value Relation to target_p layer with only 3 nearest ...
Rii Pii's user avatar
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1 vote
0 answers
54 views

Display only the features of a layer that are intersected by a dynamic atlas layer in QGIS

Is there a way for a layer (line) that has the symbology displayed dynamically by Atlas to determine ("filter") the symbology display of another layer (polygon) by intersection? Example of ...
Raphael Dias's user avatar
0 votes
1 answer
92 views

How to know the origins of the result of shapely's symmetric_difference?

Suppose I have two line geometries: import shapely line1 = shapely.geometry.LineString([(0, 0), (2, 0)]) line2 = shapely.geometry.LineString([(1, 0), (3, 0)]) shapely.symmetric_difference(line1, ...
Felipe D.'s user avatar
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1 vote
1 answer
112 views

Controlling the grid_size in geopandas' symmetric_difference method

Operations in Shapely Suppose I have these two line geometries: import shapely link_12 = shapely.wkb.loads(b"\x01\x02\x00\x00\x00$\x00\x00\x00\xcc\xd4\x02\x96q\xb9-A\x8a+\xd1)\xda\x801A\xb1\xf3\...
Felipe D.'s user avatar
  • 2,679
0 votes
1 answer
290 views

Getting all layers hovered over in a layer stack in Leaflet?

Using Leaflet with a map that has multiple layers on it, how can i get a list of all the layers hovered over, a la ArcGIS Online? For example, suppose i have two circles A and B on a map in standard ...
Alex's user avatar
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-1 votes
1 answer
106 views

known contained polygons on geopandas return everything False for "contain" and "within" when dissolving one layer

I have two geodataframes: gdf1= 1000 polygons gdf2= 26 polygons that are bounding box of 26 polygons from gdf1. I would like to get the all the polygons from gdf1 that are not within gdf2. I decided ...
ReutKeller's user avatar
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1 answer
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Leaflet image overlay align with pixel coordinates on map

I have successfully displayed my image on a map at specific location using the bounds of a polygon. Here is the screenshot of the image displayed on top of map at around specific boundary bounds. var ...
Ahsan Mukhtar's user avatar
2 votes
0 answers
33 views

Assessing two rasters to identify areas where one species exists but not other using ArcGIS Pro

I'm re-learning ArcGIS Pro having not been in the GIS world for quite a few years (not since ArcMap). I have two vegetation species raster data sets and what I'd like to do is to find the areas where ...
Emily's user avatar
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1 vote
0 answers
120 views

Creating 100m Buffer From coastline inward, for administrative municipalities in ArcGIS Pro

I am attempting to create a 100m Buffer from the coastline inward for the entire perimeter of Jamaica. I will be overlaying Landsat images over an administrative shapefiles. My end goal is to do ...
Matt's user avatar
  • 93
2 votes
1 answer
42 views

Add overlay to line geometries in symbology

In QGIS 3.22, I have a MultiLineStringZ layer with crossing geometries and I would like to represent either the Z component with overlay, or be able to order the geometries so that the last ones are ...
dmjf08's user avatar
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2 votes
2 answers
131 views

How can I calculate identifier TRAM field for this polylines

I would like to have any id field TRAM, together lines by group between 2 points, names (PE....). The idea is to write an expression using field calculator to get their id. The lines are always ...
Eduerst's user avatar
  • 23
2 votes
1 answer
432 views

Vector overlap analysis in QGIS

I'm in the search of the right tool to accomplish the following tasks: I have vector layer A,B,C and D. I want to overlay vector layer A with B, C and D. If, for example, vector layer B is overlapping ...
MrSalamikuchen's user avatar
2 votes
1 answer
66 views

QGIS 3.6 on Mac: Extracting attribute value of polygon from another layer when it overlay

I have a layer labeled "Boundaries" with a set of polygons. I have another layer with a set of points labelled "Locations". The "Boundaries" polygons have an attribute ...
Toufik's user avatar
  • 21
1 vote
1 answer
154 views

Automatically plotting linestring flight path trajectories onto photos of the sky

Can anyone suggest how we would lay linestring flight tracks on a terrestial sky image (see below). The flight tracks are as geopandas linestrings. We want to do this for thousands of images.
Thirst for Knowledge's user avatar
3 votes
1 answer
358 views

GeoPandas Explode Multi-Polygon Holes Filled Inexplicably

I've run into an issue with the Geopandas explode method. When I run the explode method, multi-polygons which originally had holes are filled inexplicably. I need to expolode the multi-polygons in a ...
Joshua Croff's user avatar
1 vote
1 answer
193 views

Toggle Leaflet JS KML layers individually

I'm creating a map with multiple KML layers, and have been able to get the KMLs to appear, however, implementing a simple checkbox to turn each layer on and off is proving to be a problem. I've tried ...
John Spartan's user avatar
1 vote
0 answers
74 views

QGIS - Aligning Cells from Multiple Overlay DEM's [closed]

I am modelling a volcano with a changing landform using 5 overlaying DEMs at different stages of the volcano collapse. I need the cells of each DEMs to line up vertically so I can obtain elevation ...
Fitch's user avatar
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1 vote
0 answers
23 views

Assessing overlaid data in QGIS [closed]

One of my research objectives is to evaluate the storm surge hazard map provided by a certain weather agency against the storm surge height and inundation of a recent typhoon (both in CSV format). As ...
Haibara's user avatar
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3 votes
1 answer
56 views

Is the geometric result of an intersection between two valid PostGIS polygons guaranteed to be valid?

If I have two overlapping PostGIS Polygon geometry objects, which are valid, is the result of an intersection operation between the two meant to be guaranteed to be a valid geometry? Obviously this ...
bugmenot123's user avatar
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1 vote
1 answer
68 views

Is the geometric result of an intersection between two valid JTS polygons guaranteed to be valid?

If I have two overlapping JTS Polygon objects, which are valid, is the result of an intersection operation between the two meant to be guaranteed to be a valid geometry? Obviously this guarantee could ...
bugmenot123's user avatar
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0 votes
1 answer
48 views

Isolate pixels from trend raster in ArcGIS Pro

I'm using the generate trend raster tool (Mann-Kendall) and would like to isolate the resultant pixels from the sen's slope band that also show "significance" from the p-value band at the ...
b_squared's user avatar
1 vote
1 answer
2k views

Adding image overlay to Google Earth Web

I am trying to add an image overlay to Google Earth Web. It works fine in Google Earth Pro on my desktop, but I can't seem to make it work in Earth Web. I want to be able to have folders in my project ...
ceciliap's user avatar
1 vote
0 answers
79 views

Display Multiple Raster Grids as Triangles Instead of Squares

I am looking to show a negative correlation between two raster datasets (distance to nearest agricultural market and nighttime luminosity) and think it'd be fun to be able to show viewers the raw data ...
Vincent Armentano's user avatar
3 votes
1 answer
232 views

QGIS expression - overlay function, using overlay function as filter

I have a point layer with one field, id ranging from 0 to 9. I have a polygon that intersects some of the points, like so: My aim is to use an expression to get the intersecting point with the ...
Matt's user avatar
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0 votes
0 answers
155 views

Calculate percentage overlay of one polygon layer over grid then multiply percentage with associated grid values

I am overlaying a polygon layer with shapes representing cities over a 0.5 x 0.5 km shapefile grid. Each grid cell has an associated GDP value representing the entire GDP of said grid cell. The ...
digital-consolation's user avatar
1 vote
1 answer
244 views

Show element div collapse when click on map for `getFeatureInfoUrl`

I have a slide toggle that slides from right to left. I want when getFeatureInfoUrl is activated the result will be displayed in slide toggle and slide toggle automatically open. Now i was able to get ...
Jayzz's user avatar
  • 85
2 votes
0 answers
168 views

Creating Colorized Hillshade by Overlaying Hillshade and Color-Relief

I am trying to create a colorized hillshade using gdal and store it as a new file. I'd like to use the 'overlay' method (see also: Overlay) Unfortunately, it doesn't produce what I'd expect (which ...
Zev_Zide's user avatar
  • 187
-1 votes
1 answer
51 views

Finding features based on percentage overlap of another feature

I have a feature class of 'Firezone' polygons. I have a feature class of 'Area ID" The Area ID features are smaller than and overlap the Firezones. I wish to find all of the Area ID features that ...
Patrick John Lazaro's user avatar

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