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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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0answers
103 views

Problems with weighted overlay on QGIS for Mac

I am a beginner on GIS seeking to finish a suitability analysis. For this I was planning to use 'vector to raster' tools as well as a 'weighted overlay analysis' to find the most suitable areas. I ...
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2answers
884 views

Leaflet dynamic legend for active layer controls?

I´m trying to achieve a map legend that shows the names of the active Layers and also adds new names to the list every time a new layer is checked. Also it should only appear when at least one layer ...
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1answer
216 views

Custom Overlay Grid - Labeling the axes differently

i have a map where i want to put the grid axes. i have a separate layer based on which i want to create the axes. now custom overlay feature in arcGIS gives you only one label field to label the axes ...
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1answer
2k views

How to select polygons by points in R?

I have a shapefile with polygons and another one with points. I would like to create a new shapefile with those polygons that don't contain any point inside. I tried the function sp::over in R and it ...
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1answer
30 views

Finding area from overlay feature class?

I want to extract the counties (green area) overlaying with another feature class (pink area) using ArcGIS 10.3.1 (Advanced). I am using spatial join and find the Join_Count > 0 to select out the ...
2
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1answer
90 views

Calculating areas by overlay analysis of two tables with several information

I have to calculate the areas (m2) of the blue, green and yellow polygons within different vegetationtypes (also polygons - the table is overlaying the colormap). I have to calculate how large areas ...
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120 views

How can I display world hillshade and a shapefile without losing original colors and hillshade details?

This is what I am trying to do, but I am using the World Hillshade file from ArcGIS online and a land status shapefile: http://www.esri.com/news/arcwatch/0312/learn-a-new-method-for-displaying-...
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1answer
459 views

How can I improve alignment between google maps and overlays coming from a different coordinate system?

After some work, I managed to extract some PNGs out of a GIS we have at work. This GIS has some polygons in which addresses are surrounded by them. I managed to create an extractor in Python and to ...
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2answers
403 views

Creating raster from several polygon layers using ArcGIS Desktop?

I have the following map: The four layers have the following attribute tables: SF_UrbanTreeCanopy_84 SF_Building_Footprints_84 GrassBeach Water I want to create a ...
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0answers
24 views

Attribute extraction using buffer on top of a raster layer [closed]

How can I extract attribute information from a raster map? I work with camera traps and I am interested in collecting habitat information off a raster sheet. I am interested in a certain radius ...
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0answers
95 views

How to align 3D contour file, aerial imagery and design drawings from engineers in microstation v8i series 3.

I am looking to align a 3D contour dgn file with the design drawings from an engineer in microstation. Then align an orthorectified aerial image (Scale 1:10 000) to the contour file and design ...
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0answers
73 views

Overlaying point data with NDVI layer with raster output (not graph)

I have point data, which are animal burrows, and a NDVI raster layer that shows plant productivity. I want to overlay these layers and determine if vegetation productivity is higher close to burrows (...
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1answer
417 views

Determining which polygon(s) each point lies in using QGIS?

I am using QGIS software. I have shapefile layer of points and a shapefile layer of polygons(many of them overlapping). I need to determine which polygon(s) each point lies in. I tried "Join ...
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1answer
208 views

Counting overlaps on large line dataset using FME runs into memory issues?

I have a large dataset of lines (ca 400 000). Each line represents a calculated route on the same road network. My goal is to summarise a total number of calculated trips that pass each part of the ...
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0answers
85 views

Create A Maximum-Gradient Vector Overlay QGIS

I have generated several vector layers of different gradients and geographic areas (PUMAs, ZCTAs & Census Tracts). Is there a way I can overlay all these layers with the aim of identifying the ...
2
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1answer
268 views

Spatial Join if more than 50% of join feature overlay target feature?

My ModelBuilder in ArcMap 10.3 includes 2 Shapefiles: Buildings footprint (polygons). Red shapes (polygons) which includes information for each building. The task is creating new layer that contains ...
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0answers
500 views

How to host kmz file for Google Earth Pro network link

I have a repository consisting of a large number of image overlays, polygons, and 3d polygons in Google Earth Pro. The image overlays are linked to and stored on a windows web server and it works fine ...
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0answers
239 views

Overlaying shapefile on ggmap [closed]

I have a dataset of village boundaries in ESRI format. with the following projection information, GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]], PRIMEM["...
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1answer
416 views

ArcGIS Combine Fuzzy Membership and Weighted Sum

I would like to combine the workflow of fuzzy membership and weighted overlay for a suitability analysis and would like to ask if this is "allowed" scientifically. I have severeal criteria, some ...
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1answer
25 views

Assigning value to point feature class based on count of cells with certain raster values?

I have a point feature class that I would like to assign a new field based on the neighborhood of a raster layer. I'd like to count the number of cells within that neighborhood and write that count ...
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2answers
684 views

Computing dominant area in polygon using ArcGIS Desktop?

First, I have a shapefile consisting of square grids and each grid has an ID. Second, I have a shapefile consisting of different zones (with IDs). A grid ID in the first shapefile can contain many ...
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1answer
851 views

Blending overlapping raster mapsheets with QGIS and GIMP

How can overlapping raster map sheets be overlaid in QGIS, and manually blended together in GIMP? I have an overlapping set of hand-drawn raster maps that contain varying levels of detail and would ...
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1answer
461 views

Overlay shapefile data with polygon shapefile

I would like to add the overlapping data of a worldwide shapefile, to the different European nuts3 regions (polygon shapefile). However, there is something wrong with the script below as it does not ...
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1answer
1k views

Multiple overlay/intersection geoprocessing

Is there any GIS function which gives back the polygons of the intersections by storing the number of the overlapping surfaces to an attribute? Or do you have a script for this purpose? A sample pic ...
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1answer
536 views

Buffer without overlay

Have searched the Interwebs for a few hours now but haven't found an answer to a problem which I thought would have a standard solution. I'm using QGIS to do some analysis on the reach of bus stops ...
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1answer
366 views

Map matching of one sided road data to two sided road data

we use BOS method (Goodchild and Hunter,1997) for checking the positional accuracy of test map dataset by buffering around the reference dataset and then check for percentage coverage of test dataset ...
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1answer
187 views

Mapinfo SQL - create table that shows where a new polygon does not intersect with another

I am attempting to carry out SQL to - create a table that shows where a new polygon (Proposed BMO Overlays) does not intersect with another (Existing BMO Overlays). I have attached an image on my Map ...
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1answer
271 views

Using different resolution for two overlaying layers?

If I have 2 layers: one satellite image (15m resolution) and one relief (about 30m resolution). Can I overlay the relief with some transparency over the satellite image? It obviously "works" but ...
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0answers
102 views

Identifying rasters with specific attribute value that intersect polygon using ArcGIS for Desktop?

I have numerous raster files that each contain an attribute field "VALUE" that can take on the values 0 or 1. How can I identify rasters that have any of their "VALUE=1" cells intersecting a focal ...
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0answers
81 views

Create junction raster from stream and road rasters

I have converted two vector polyline datasets to raster format. One represents streams, and one represents roads. I need to create a third raster layer that contains cells where there are stream ...
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2answers
41 views

Spatial Join for coregistered polygon data from different dates

I have three separate feature datasets of 125 polygons that contain plant respiration, incident sunlight, and soil moisture data collected on three different dates. The polygons are perfectly ...
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2answers
1k views

Creating prediction grid within certain boundary for surface interpolation in R?

I am trying to create a prediction grid within my boundary polygon. Firstly I need to make sure that my boundary shapefile is in UTM coordinates: NZGD <- CRS("+init = epsg: 2193") Load my ...
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1answer
220 views

Automatically populate attribute table based on feature location within another feature?

I have two datasets. One of all the suburbs in a particular state. The other of all the housing lots across the state. I want to add a field to the lot feature class' Attribute table which can then ...
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0answers
51 views

Combining line vector shapefiles with different attributes

I'm using ArcGIS 10.3 for desktop. I have two shapefiles, both with polyline vector data for roads in the same area. This area is quite large, approximately 7,500 km², so there are a lot of roads in ...
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1answer
220 views

Weighted polygon-feature-classes combination/overlay analysis using ArcGIS for Desktop?

I have several (sometimes, not always overlapping) Polygon Feature Classes which are all weighted/ranked through a field from 1 to 10 (10 is best). I would like to combine/overlay these layers them, ...
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1answer
1k views

Don't understand error : Error in if (nchar(projargs) == 0) projargs <- as.character(NA) :

When I run two different scripts from examples (which seem to work where I took them from) I get an error in both cases. Something seems to be wrong in my general set up or something. But I have no ...
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1answer
137 views

Overlaying two vector shapefiles on a basemap results in a misalignment

I have been trying to overlay two shapefiles of the Harare Zimbabwe streetmap one with centerlines and the other digitized as polygons. the challenge i am facing is that the two overlay but not on the ...
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2answers
690 views

KML for Labels in Cesium to Display Countries, States, Roads, etc

Is there a free way to display countries, states, roads, etc. in Cesium? I imagine these could be displayed using a comprehensive list of ground overlays in KML. I have looked for free sources of KML ...
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2answers
3k views

R: Overlay using functions containing if/else statements

I have two rasters, x and y, and I'd like to do calculations with them using the overlay function. For example, MyFun <- function(x, y) x * y res <- overlay(x, y, fun = MyFun) This seems to ...
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1answer
1k views

Is it possible to intersect multiple polygon shapefiles to identify areas where two or more layers overlap?

I have 19 polygon shapefile layers, with some occasionally overlapping with one another. As a final output, I would like a shapefile that includes only the overlapping areas between 2 or more of these ...
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1answer
90 views

Combining Data from raster and polygon

I am teaching myself GIS at the moment, and there are still some matters I haven't quite got the hang of. I'm using ArcGIS 10.1, and have three datasets: LAYER 1: A population dataset at a high ...
2
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1answer
1k views

Summarising an attribute from point layer in polygons with FME

I have a number of polygon feature sets and a point layer containing an attribute with population count. I want to summarise the population attribute for all points within each polygon feature set ...
2
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1answer
273 views

Calculating total area overlapping specific raster DEM color interval whose boundaries are confined by another vector?

I know this sounds quite difficult, but maybe it isn't for you or at least it shouldn't if I explain it correctly. (I'm using QGIS 2.14) I'd like to know to calculate total area overlapping a ...
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2answers
3k views

Tile server overlay in Google Earth?

I have recently become aware of a number of tile-server map sources and I would like to use these as overlays in Google Earth. Is there a way to do this directly that does not involve pre-downloading ...
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1answer
840 views

Leaflet Basemap and Overlay Display

When running this why does the open street layer not show up as the base layer by default? and why does the precipitation layer come up as already checked to display? None of the other overlays ...
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1answer
103 views

How to delete overlay within the same feature class?

So, the following scenario: I have plenty of polygons that are within another polygon, all in the same feature class. All of the polygons (the one overlaping the other ones as well as the ones being ...
2
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1answer
159 views

How to display data at diffrent depths in ArcScene

I am looking for a way to display data at different depths in ArcScene. I have a bathymetry layer which displays fine, and I want to overlay oil platforms in 3D over the bathymetry to show where ...
1
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1answer
60 views

In ArcGIS Modelbuilder: Mean value of different polygons within a buffered zone, weighted by area percentage

I am creating a model in ArcGIS model builder (10.2). I have buffered zones (polygons) and within these zones there are different soil types (polygons; Shapefile feature class). I have assigned values ...
4
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2answers
926 views

Overlaying a polyshape to faceted maps in R with ggplot?

I have managed to create a faceted map from my data following the approach proposed here http://spatial.ly/2013/12/introduction-spatial-data-ggplot2/ with the following code: ggplot(data = plot.data,...
3
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1answer
89 views

Polygon made by colour difference

I need to analyze differences (historical) in coverage of some species (seagrass Posidonia). Although its a marine species, subject area is very shallow and even from common satellite and aerial ...