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.
337
questions
-2
votes
1answer
22 views
Finding overlay/intersect shape percentages using QGIS?
I am working on a project in which it's necessary for me to overlay 2 layers (a map of precincts and a map of census tracts).
I need to be able to determine the %area of each census tract covered by ...
0
votes
0answers
12 views
How to select SpatialPoints inside the SpatialPolygons
I have two documents. One is a csv file which contains lon and lat information. Another is a shapefile.
I want use "over" command in r to select points inside the polygons, but I get all NA results. ...
1
vote
2answers
35 views
Adding information to polygons inside polygon from other polygon in QGIS?
I have two layers in QGIS. The first one contains buildings and the second one contains blocks. Now I want to add the ID of the block to all buildings inside this block.
Are there any functions in ...
0
votes
0answers
22 views
Coordinate system problem; two features won't match up (linear units problem?) [duplicate]
I have two features that should overlay, both are shape files and one is polygons and one is polyline. The line should essentially outline a specific region in the polygons, but they are completely ...
1
vote
1answer
45 views
Overlaying satellite image tileLayer over OpenStreetMap in LeafletJS?
I am currently creating a web app for visualizing disaster impact via satellite imagery. I have satellite images (.tif) which I need to overlay over OpenStreetMap. Since .tif file is very large, I ...
1
vote
0answers
26 views
Imported CSV point data layer invisible over the raster map layer, though each layer shows good separately “zoom to content” [closed]
I am trying to import CSV file (comma delimited text) and get no reported errors but there are no points data visible overlays over raster data map
1. QGIS 3.6
2. the point data layer over raster ...
1
vote
1answer
19 views
KML file with multiple ground overlays
I have geolocated imagery which I would like to plot in Google Earth. I have the 4 corner points of each image, and I am currently laying the images down using GroundOverlay and gx:LatLonQuad.
My ...
1
vote
0answers
30 views
QGIS: habitat suitability/combining raster layers
I have created a number of raster layers for different environmental factors (slope, roads, rivers, forest cover) and want to combine them to find areas where the 'ideal' aspects all overlap. For ...
0
votes
0answers
16 views
Clip OR Overlay in ArcGIS output feature empty
I use the Clip and Overlay to deal with download data. But they do not work and result in failure. Maybe the data is too large for ArcGIS Desktop to calculate. I do not know where I can check whether ...
2
votes
1answer
56 views
Averaging overlapping rasters with gdal
I am working on creating a class which will merge several georeferenced rasters into one using different strategies, essentially taking average, max, min where the images are overlapping.
So far I've ...
0
votes
1answer
16 views
Rotating around arbitrary point, not center when using Google Earth Pro to Edit Image Overlay?
In Google Earth Pro "Edit Image Overlay", we can rotate the overlay
around its center (via grabbing the green diamond,) but how might one
rotate it around an arbitrary point not its center?
(Yes, ...
0
votes
1answer
29 views
Enlarging/shrinking while maintaining aspect ratio when using Google Earth Pro to Edit Image Overlay?
In Google Earth Pro "Edit Image Overlay", the only way I have found to enlarge
or shrink the overlay while maintaining the X:Y aspect ratio is to
grab one of the four green corners (not the four ...
0
votes
0answers
27 views
Leaflet image overlays and iOS 12: partial rendering
My PWA (using Leaflet 1.5.1) is currently running (since 2 years) on Android and iOS without problems, until iOS 12 was released. From that point on I have very weird issues on iPhone and iPad.
Main ...
2
votes
2answers
48 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 ...
1
vote
0answers
80 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,...
1
vote
1answer
58 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
votes
1answer
17 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 ...
0
votes
0answers
30 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 ...
1
vote
1answer
17 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
votes
2answers
53 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
votes
1answer
34 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 ...
1
vote
0answers
63 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
vote
1answer
49 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/...
1
vote
0answers
23 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
votes
1answer
76 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?
0
votes
1answer
1k 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
votes
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 ...
0
votes
0answers
8 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
votes
1answer
107 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
vote
0answers
23 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
votes
2answers
97 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
votes
1answer
385 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
40 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
89 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
88 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
60 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
96 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
66 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
144 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
392 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
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
189 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
181 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
18 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
103 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
39 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
96 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
1k 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)
...
2
votes
2answers
394 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 ...
