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.
2
votes
1answer
28 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
vote
1answer
37 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
41 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
24 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
33 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 ...
-2
votes
1answer
35 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 ...
1
vote
3answers
94 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 ...
1
vote
1answer
66 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?
1
vote
2answers
38 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
75 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
vote
1answer
61 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
vote
0answers
13 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 ...
0
votes
1answer
17 views
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. Would be ...
1
vote
1answer
59 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
vote
1answer
35 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
vote
0answers
56 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 ...
2
votes
1answer
197 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
123 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
vote
0answers
28 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
96 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
43 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
34 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
65 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
95 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 ...
1
vote
0answers
37 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
54 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
338 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
204 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(...
0
votes
0answers
274 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
239 views
Overlay density plots over raster in R
I am trying to put a density curve over a raster in R. I can plot raster in R using:
library(raster)
library(sp)
library(ggplot2)
library(rgdal)
MAT_FP_1 <- raster("grid.bil")
plot(MAT_FP_1, xlab="...
0
votes
0answers
112 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 ...
1
vote
0answers
31 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 ...
0
votes
0answers
9 views
Raster overlay based on similarity to point?
I have multiple survey points, and I want to match each point with a different point in space that is similarly based on 5 raster layers.
I understand how a raster overlay works, but I'm interested ...
2
votes
2answers
98 views
Why such a large difference between overlapping LiDAR DEM values?
Background:
Using Arc Desktop 10.5.1, I have been tasked with mosaicking two adjacent LiDAR rasters (I'll call them A and B). They were flown, processed and supplied under contract by different ...
1
vote
0answers
58 views
Percent of polygon area within multiple ring buffers using ArcGIS Desktop?
I would like to calculate the percent of area of polygons that are within multiple ring buffers of a number of points. The polygons are associated with a specific point so I would like the buffers to ...
3
votes
1answer
243 views
ST_RELATE - Intersect ignore shared boundary
Using postgis I am trying to find polygons that intersect, ignoring polygons that only have a shared boundary (edge).
ST_Relate(g1, g2, 'T********') is a standard intersection.
ST_Relate(g1, g2, 'TF*...
8
votes
1answer
2k views
equivalent of sp package's point in polygon / overing using sf
I am migrating code from sp package to the newer sf package. My previous code I had a polygon SpatialDataFrame (censimentoMap) and a SpatialPointDataFrame (indirizzi.sp) and I got the polygon cell id (...
1
vote
1answer
93 views
Geopandas overlay issue [closed]
I am trying to get an overlay (intersection) of two collections of polygons
in geopandas:
splits = gp.overlay(nhds, cts, how='intersection')
but result is very weired (see the picture below).
I ...
1
vote
0answers
67 views
QGIS 2.18 r.patch fails “Input raster map contains cells with NULL-value (no-data)”
In QGIS 2.18.16 with GRASS 7.4.0 (Windows 7, 64 bit), I am trying to create a composite raster layer from two nearly identical versions of a 3-band color geotiff that almost (but not quite perfectly) ...
1
vote
1answer
576 views
Assigning raster values to spatial point using R?
I have a SpatialPointsDataFrame and create a raster object. I assign each raster cell a value and like to extract that value for each spatial point. I.e. if a point lies within a raster, I'd like to ...
0
votes
0answers
39 views
How to combine (not intersect) the widths of two buffers within the length that they they overlap, but discard the rest?
I am using ArcMap 10.5. I am trying to clip the black line so it becomes a similar length/extent of the pink line. I created a buffer around each line to help with this. I have been trying to think of ...
1
vote
2answers
2k views
Defining which layer (overlay) is displayed on Leaflet map?
I have 7 layers overlay on a base map, i need to define which layer is selected (active,displayed,shown) on the map.
var overlays = {
"AL HOUDA Espaces_Verts": alhouda6_layer,
"...
1
vote
0answers
162 views
Imagemosaic no-data pixels problem transparency [closed]
I'm trying to display imagemosaic where image are irregular and near each other.
Imagemosaic are displayed with a SLD
Images overlap and no transparency is applied
When publish imagemosaic, I set ...
0
votes
0answers
262 views
Overlaying a .png image that comes with a world file in UTM with OpenStreetMap data?
I have received a geocoded .png image (2380 x 2396 pixels) that comes with a world file containing georeferencing information in UTM format:
worldFileParams = [0.5,0.0,0.0,-0.5,690920.0,5335407.5]
...
0
votes
2answers
271 views
An image on top of the marker with Leaflet
How can I achieve the same result (image below) with Leaflet?
L.imageOverlay() only can supply one image, and the image size is based on (lat, lon).
But what I need is the image size the same as the ...
0
votes
0answers
120 views
How to add, overlay or merge 2 rasters with different classes together?
There are two rasters as presented in the images.
The first raster represents danger area with classes Low(1), Moderate(2) and High(3).
The second raster represents additional danger, which is ...
0
votes
1answer
777 views
Extracting data attributes from SpatialPolygonsDataframe and put into dataframe using R?
I want to extract all the data attributes from my SpatialPolygonsDataframe, including the ID of all polygons.
The reason I want to do this is the following. I have a SpatiaPolygonsDataframe (which I ...
1
vote
1answer
118 views
Calculate overlay area - QGIS (Essen)
I have create a layer that is the represents the overlay areas based on some condition. The overlay is represented in purple:
I want to know the area of the overlay - which is a separate layer that ...
2
votes
1answer
189 views
Rasters in R - merge taking mean, excluding NAs. Overlay and Mosaic both giving funny results
I have a series of raster images, all derived from LandSat data, which give pixels a value of 1 if they are predicted to contain water, 0 otherwise. Many of these images are from the LandSat 7 ETM+ ...
0
votes
1answer
30 views
Geotiff downloaded with same coordinate system don't overlap [duplicate]
I am a beginner usign ArcGis, i downloaded two geotiff with the same cellsize and with the same GCS ( GCS_WGS_1984) but it seems that the two images don't perfectly overlay. Looking at the extent of ...
