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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1answer
31 views
OpenLayers overlay bubbling problem
Regarding on the previous question asked https://gis.stackexchange.com/a/303372/119333, solution from best answer is implemented and its working. I am rendering tab panel inside popup overlay and you ...
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0answers
39 views
Setting bounds for image overlay in Leaflet
I'm using LeafletJS map. I need to use an image overlay. I have done it like so:
onMapReady(event: any) {
this.layers.push(imageOverlay(this.imgSrc + "map.png", [[35.334847, 25.328072], [35.337847,...
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1answer
53 views
Getting Canada shapefile to overlay model on QGIS?
How can I get Canada to overlap with the rest of my map?
I think this is a CRS problem but I really do not know how to solve it.
0
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1answer
12 views
Image Overlay 3D Adapt in Google Earth
When adding an image overlay (specifically a GeoTiff exported from QGIS), the image looks great until you turn on 3D buildings or terrain. These features pop through the image overlay, and disrupt the ...
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0answers
20 views
Creating a Leaflet Overlay from JSON
I am trying to make an interactive map using leaflet where the user can toggle an overlay of multi-polygons. So far the following code works using a checkbox to display dummy point data, and radio ...
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1answer
16 views
How can I get common points of different point shapefiles in ArcGIS? [closed]
I have different data sets (point shapefile) and how can I get common point points of these shapefile in ArcGIS?
2
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2answers
49 views
Raster Calculation with 2 Raster Layers [closed]
I am attempting to create a new raster layer based on the values of one raster layer using a formula that is conditional based on the values in another layer.
Two source layers:
> ndvi
class ...
0
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1answer
30 views
CAD data not overlaying in ArcGIS, but has correct coordinates in AutoCAD
I received a set of drawings that were drawn in millimetres but in the correct coordinate system; I use GDA94 with my coordinates in metres, so this should theoretically be a simple fix using my usual ...
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0answers
56 views
PyQGIS overlaying raster image on vector map correctly?
I have some code written in Python using PyQGIS where I am trying to overlay a raster image gridded with coordinates on to a vector shapefile map with the same coordinates. However, when overlaying ...
1
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1answer
29 views
Ordered weighted averaging error QGIS
I am trying to use Ordered weighted averaging to sum up values across different raster overlays in QGIS 3.4.4, but I get this error:
Traceback (most recent call last):
File "C:/PROGRA~1/QGIS3~1.4/...
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0answers
20 views
Using Interactive Overlay to Export Geographic Coordinates
I can barely spell JavaScript, but I have envisioned an application working with or embedded in Google Earth that employs the following work flow:
This application is intended on working at scales of ...
0
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1answer
45 views
GeoPandas Overlay Symmetric Difference: How to get the upper polygon
I have the following code which get the difference of a pie wedges.
c= gp.overlay(a,b,how='symmetric_difference')
How to get the upper polygon?
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1answer
635 views
OpenLayers 5 add multiple markers
I'm using OpenLayers 5 to show a map and add markers to it.
I can see the map without any problems but only the last marker is shown. I saw an answer about using .clone() method on the marker that's ...
0
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0answers
15 views
Raster Weighted Overlay Terminology
In a Arcmap raster weighted overlay, if an input data set is designated as "restricted" will overlay calculations not be performed on the "restricted" areas, and those areas will be included in the ...
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0answers
7 views
gdal2tiles.py output tiles changed on new install. geodetic image overlay shifted
given a global coverage image at .04 deg from 60N to 60S and -180 to 180 I previously generated tiles for google overlay using gdal2tiles.py once I determined the right syntax/args to use. The image ...
0
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1answer
79 views
Counting number of polygons within polygons using R?
I have two huge shapefiles. One contains polygons of one kind of vegetation and the other one representing a grid. A situation as follows but, of course, much bigger:
I need:
the efficient way to ...
1
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0answers
21 views
GeoServer-Mviewer : point layers over surface layers
I am working on an interactive map designed under Mviewer package and using GeoServer to save symbols and layers. I have a specific issue on it: I managed to generate all layers correctly in my ...
0
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2answers
76 views
Reclassify a raster in R based on two rasters with the output containing over 1000 bands
I am trying to convert the outputs of a model into a raster based on both a temperature raster and a seasonality raster. I have over 2100 bands so ifelse statements aren't going to cut it.
An example ...
0
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1answer
185 views
Computing number of points in a raster grid cell in R
I have a country shapefile and a dataframe with coordinates of bird sightings. My goal is to "rasterize" the shapefile and compute the number of points within each grid cell. Specifically, I want to ...
2
votes
1answer
39 views
Calculate distance between buffer and geographic points for grouped subsets (and get tally)
The data I used can be found here.
After importing my data, I select a subset of points (Nest2017 in column type) to create 30 m buffers around:
library(dplyr)
nests<-df %>%
filter(type %...
1
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1answer
72 views
Using Statistics by category in QGIS?
I use the "statistics by category" tool from QGIS to learn what grain yields I got from different combinations of scenarios like:
Soil A + Hybrid A + Planting Date A = Yield n
Soil B + Hybrid A + ...
0
votes
1answer
68 views
Overlaying raster image with different geographic extent using ArcGIS Desktop?
I have two raster image i.e A & B of different geographical extent. A image have the large geographical extent with raster value of 1 whereas B image is cover the smaller geographical extent ...
2
votes
1answer
45 views
Zonal statistics on raster layers that intersect line
I have a line feature class of routes and a raster file with 12 unique values. I want to know how much cells of each value in the raster has that intersect with lines.
I've tried zonal statistics (...
0
votes
1answer
75 views
KML Screen Overlay - works on google Earth but not on ArcGIS
I've been trying various things to get this to work on ArcGIS Online for the past couple of hours, but have not been able to figure it out.
It works perfectly fine on Google Earth but ArcGIS Online ...
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votes
1answer
59 views
Calculating wetland coverage/overlay over parcels of land? [duplicate]
I have two layers. Layer 1 has features that are property/parcels with area in acres. Layer 2 has features that are wetlands/bodies of water with area in acres.
I want to calculate the percentage of ...
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3answers
131 views
Spaghetti, meatballs, and the one-to-many problem
I am trying to use the Spaghetti and Meatballs overlay technique to create a fire history layer from Cal Fire FRAP's fire perimeter data. I am following the technique Dale Honeycutt describes in his ...
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1answer
293 views
Calculating area of overlap between two polygons in separate layers using QGIS?
I have 2 layers with 1-1 polygon. The polygons are overlapping.
How do I calculate the area of the overlap using QGIS?
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2answers
41 views
Polygons from different layers
How to create a map with polygons from all the different layers?
I'm using ArcGIS Pro and it does not have Overlay analysis tool.
0
votes
2answers
156 views
R: Reclassify a raster stack through the range of the quantiles of each layer. Generic quantiles function ; layer by layer
I have a raster stack that contains terrain bends extracted with different neighborhood windows "crosc_nxn" (e.g. 3x3, 5x5, etc ...).
crosc_nxn <- raster::stack(path.files.list)
> crosc_nxn
...
1
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1answer
144 views
Dynamically set mapview based on the overlay feature of L.geoJson coordinates in Leaflet
I want to dynamically setView of the map based on the overlay feature which I extract from L.geoJson in Leaflet. I tried using fitBounds, which doesn't seem to work. Here is the code snippet:
var ...
1
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0answers
15 views
Iterating over set of feature classes and spatial join to create only one output? [closed]
I have a feature dataset with 50-some odd feature classes (polygon) that all have fields that I need to spatially join to one feature class (point).
So in the end, I only want one object with all of ...
-1
votes
1answer
27 views
Determining map overlay diagram origin?
I am trying to determine the origin of the popular map overlay diagram that shows a GIS as a stack of map layers connected by four vertical lines representing the geo referencing system.
Can someone ...
1
vote
1answer
88 views
calculation with raster and numeric values in Loop with R
I want to do some calculations with a list of rasters of lakes. Therefore I wrote a loop, which has so far worked fine when I only used rasters. Now I have calculations with rasters and numeric ...
1
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1answer
36 views
Fixed buffer remove overlayed area
I have a problem with a fixed layer.
I have to count accident by Link within 100m area.
When I use a Fixed Distance Buffer, there is a problem because some area is overlayed so they will count 1 ...
1
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0answers
85 views
Bing and Esri satellitary basemaps are misaligned by about 2 meters
Did you ever notice a shift (2 meters) between satellitary basemaps from Bing and Esri?
The problem basically arose when GIS technicians have to deal with drawings made in CAD using Bing basemaps as ...
3
votes
1answer
743 views
How can I superimpose a geopandas dataframe on a raster plot?
I have a geopandas dataframe countries with country polygons, and a raster dataset raster (read with rasterio). I've already aligned the two as follows:
countries = countries.to_crs(raster.crs.data)
...
1
vote
2answers
310 views
Finding overlay percentage between two polygon shapefiles
I have two layers that I am currently working with: 1. Parcels/property boundaries and 2. Wetlands
I am trying to determine the parcels that have 0 wetlands and then for the parcels that do have ...
1
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0answers
30 views
Extracting point attributes to polygon grid in QGIS
I have point data of endagered flowers found in a number of locations. Each location may have up to hundreds of flower
registrations.
I want to end up with a 1x1km grid colour graduated from the ...
1
vote
1answer
239 views
EPSG conversion and image rotation in folium
I'm using Python's folium library (which uses Leaflet) to display images over a map.
However, my original data uses EPSG:3035 and folium uses EPSG:4326 (WGS84). There is a rotation when converting ...
1
vote
0answers
48 views
Extracting Grids containing 50% polygons (from land use layer) using QGIS?
I have a vector layer of Parcels for a certain area. I need to make grids of 100m * 100m over the parcel layer and then extract those grids which contain 50% or parcels by area.
I am currently using ...
2
votes
0answers
55 views
How to georeference multispectral raster without loss of data
I am trying to align two rasters made of data captured during same flight, but with separate cameras (drone - onboard, and Micasense RedEdge) and two separate gps devices (drone and another one ...
0
votes
0answers
80 views
Adjusting Overlay of Google Satellite Base map and Parcel Boundary
I'm fairly new to QGIS and have bounced back between version 2.18 and 3.2. I've been unable to fix my overlaying issue regardless of versions, openlayers plugin, quickmapservices, and using XYZ tiles. ...
3
votes
1answer
131 views
R Overlay points and polygons with a certain degree of tolerance
Also asked here
Using R, I would like to overlay some spatial points and polygons in order to assign to the points some attributes of the geographic regions I have taken into consideration.
What I ...
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0answers
45 views
Aligning multiple images with different spatial resolutions
I am using 2 different satellite images that have different spatial resolutions. One of them has 1 degree and other has 0.25 degree resolution. I want to subtract one image from another. So I should ...
2
votes
1answer
106 views
Find overlay between polygons excluding boundary
I want to find which polygons in a spatialpolygonsdataframe overlay each polygon in another spatialpolygonsdataframe. I have tried to use the function over from the package sp and it works fine... ...
2
votes
1answer
513 views
Convert geohash to shape/kml
I have a requirement where I need to convert a set of Geohash to KML files such that they can be used as areas to plot data by overlaying on map.
Is anyone aware of an open resource which can help ...
0
votes
1answer
288 views
Geopandas Overlay and ValueError
I am trying to get an overlay (intersection) of two geodataframes of polygons, but it returns me a ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all(...
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votes
0answers
393 views
Google Earth app KMZ overlay hidden by 3D tees and buildings
I've got a KMZ layer with an overlay layer in the <groundoverlay> tag.
I've got 3d buildings and trees in the overlay area, and they hide the overlay.
In Google Earth app it is not possible to ...
0
votes
0answers
143 views
geopandas geometry.within problem ValueError: Geometry column cannot contain mutiple geometry types
I'm trying to do an overlap of some lines with polygons with geopandas.
For a reason I don't understand, gpd.overlay(grid, hel, how='intersection') is not made for lines and polygons, so I'm trying ...
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vote
0answers
35 views
ArcGIS: Get coverage of Polygon A in Polygon B
We have dissemination area (DA) units for a city [Polygon B], and shapefiles of all parks in the city [Polygon A].Polygon A overlaps Polygon B in some areas.
We initially wanted to calculate the ...
