Geographic Information Systems

Questions tagged [vector-grid]

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Use for questions about vector grids which are also known as fishnets

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18 views

Draw a spatial grid with the lat/longs at the center of the grid using R

I looked through multiple posts on the same, and most of them end up drawing a grid connnecting the points or a grid connecting the bounding box of the coordinates. I need a grid with each of these ...
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1answer
40 views

Dividing country into maps of scale 1:25000 (metres)?

I want to divide a country into a grid of maps that will be of 1:25000 scale. I am not sure how to approach this. Create fishnet seems like a good ending point. I have some old maps of the given scale....
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2answers
26 views

Check if two different class points fall within the same cell of a grid?

I am very new to R and GIS and statistics. I'm trying to find out if two set of points of different class (ie. species) that I have are aggregated or seggregated. For that I need to randomize the ...
2
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1answer
28 views

Selecting points within fishnet grid cell with criteria of at least 3 unique values using ArcGIS Desktop?

My goal is to create a raster from points with values based on at least 3 unique IDs within a cell. Cells that had fewer than 3 points with unique IDs will have value NA. See below for clarification. ...
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0answers
20 views

Create a grid in QGIS [duplicate]

I have GIS points (x, y data) for every minute over a landscape. If I load them up as a CSV into QGIS they all show up as points, which you would expect. However, what I would like to do is use these ...
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1answer
29 views

Dividing up vector grid and scoring cells using QGIS?

I have a map of an area, have created a vector grid over this, and want to score different areas of the map by risk (high risk, medium risk, low risk), by scoring each cell. I want to define these ...
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0answers
39 views

Population calculation per grid using QGIS?

I have a ward map of a city along with the population in each ward. I have divided the map into 1 km* 1 km grids. How do I calculate the population per grid, taking into account that there can be ...
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1answer
65 views

Access geometry.coordinates of sliced vector grid

I am trying to represent LineString GeoJSON as vector tile layer using Leaflet.VectorGrid. But i need to do some interactive by clicking on vector tile layer. but this vector tile layer has came with ...
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3answers
62 views

Sum up values of neighboring polygons in ArcGIS

My question is very similar to Summing up values of neighbouring polygons using QGIS?. However, I would like to be able to perform the analysis within ArcGIS Desktop if possible. What I would like to ...
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0answers
19 views

Calculating areas and joining attributes between overlapping features

I am working with QGIS 3.4.8 and Python 3.6.8 on OSX El Capitan 10.11.6. I have two shapefilea, one which is a grid of cells (each cell a feature) and the other one which is urban settlements as ...
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0answers
24 views

Selecting grid squares (polygons) that intersect with a raster

I have a raster dataset that I have exported a subset from using attribute values (so the extract has areas where there are no pixels). I also have a fishnet grid (polygons) and I want to select the ...
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2answers
64 views

Shanon diversity index in QGIS

I'm trying to calculate Shannon diversity index for trees in a urban context. I have the following attribute table which I got joining attributes by location between a vector points and a vector grid. ...
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0answers
21 views

Fitting a grid to a research plot

I am trying to create a grid to use for zonal stats for a ag research plot. I have created some grids and rotated them and am getting decent fittings but I feel that there must be some other better ...
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1answer
31 views

How is IDW raster formed?

IDW algorithm says that it makes a grid and assigns value to each point in grid depending on the distance of separation. From this definition, it looks like the output is set of equally spaced points. ...
3
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1answer
72 views

Vector grid in QGIS3 - Can I change the order of row number?

When creating a grid (e.g. dx=15,dy=20) in GQIS 3 the first cell begins from the upper left corner and continues to the bottom of the grid as shown in the picture below. Is there any way to define ...
2
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1answer
50 views

Merging two neighboring cells in grid of type SpatialPolygonsDataFrame?

I have a grid of type SpatialPolygonsDataFrame (each cell has a set of data attributes). I want to merge each cell which has a surface < X with one of its neighbours. An example is depicted in the ...
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0answers
56 views

QGIS: creating a grid over a canvas with 50m by 50m edges

I know I can overlay a grid on my canvas by going to view -> decorations -> grid. However, I want to overlay a box grid that is 50 by 50 meters. Is there a way to specify this? CRS: WGS 84 ...
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1answer
98 views

Creating 100m^2 grid automatically using QGIS?

I need help on how to create a grid structure over my data set with each box being 100m^2. That isn't manually doing it so I can calculate the features within each box?
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1answer
26 views

Drawing polygons with specific heights and widths in ArcGIS Desktop?

I have a dataset that defines my plot corners. Within each plot, there are a number of subplots, each with specific dimensions. I need to create polygon shapefiles for each of the subplots. Is there ...
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0answers
84 views

Create a SVG layer for Leaflet from GeoJSON

I had a large GeoJSON and I display it with vectorgrid plugin for Leaflet. I want to add another layer based on the main GeoJSON with only the name of the building and display it in vector format (not ...
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0answers
48 views

Create 3mx3m Vector Grid on Worldmap with equirectangular projection in QGIS [closed]

I would like to create a 3meter x 3meter Raster Grid on a Worldmap in QGIS. I am fairly new to the whole topic but I have found out that the equirectangular projection should be the most accurate, ...
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1answer
57 views

Create a 5x5 km polygon grid by sub-setting a 10x10km one

I have a 10x10km grid in Lambert Conformal Conical projection (consider it as a sample frame). I want to create another grid 5x5km by splitting in 4 parts each one of the original grid cells (the ...
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1answer
52 views

ST_Area(geometry) with ogrinfo estimates a stable area per grid cell

I use ST_area(geometry) in order to calculate the area of each grid cell of a vector grid with LCC projection and 6x6km2 resolution. The CRS of the vector is: +proj=lcc +lat_1=45 +lat_2=22 +lat_0=38.7 ...
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1answer
86 views

Grid spacing by attributes, QGIS

Is it possible to define point grid spacing by attribute in QGIS? EDIT: I really dunno is this even possible. Added a picture where I try to demonstrate the situation. So the problem is that I want ...
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2answers
83 views

Calculate cell distance between cells

I want to calculate the cell distances between all cells within a feature class grid. Exactly the same as the game Minesweeper. I have included an example below. The original data contains 11000 cells ...
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1answer
21 views

Polygon to Raster produces misaligned raster even at same resolution using ArcGIS Desktop?

In first image is a fishnet polygon. Using 'Polygon to Raster' tool, at SAME CELL SIZE of fishnet. I get image 2 (only few pixel shown to highlight misalignment). Is it possible to convert to raster ...
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2answers
41 views

Linear fishnet grid over layer with latlong coordinates in QGIS

In QGIS I have a city boundary layer which I want to transform into a simple fishnet grid with 30m spacing. The boundary layer is in geographic degrees and the only solution I found so far is choosing ...
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0answers
108 views

Exporting a grid to KMZ with legend (QGIS 3)

I am stuck trying to export a grid with values to a KMZ file with a legend that can be viewed in Google Earth Pro. This is the grid I'm trying to export (it is in EPSG 32756) This is how I need the ...
3
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1answer
70 views

Showing only outer Fishnet boundaries

I have a fishnet layer where some empty cells are nested within. I'd like to only show the boundary of the filled cells (color set no fill, but no inner cell boundaries of adjacent cells). How can I ...
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0answers
163 views

How to create one grid from specific set of points using QGIS?

I need to create one grid/fishnet from a set of points (coordinates). I tried to do it with the point to path tool following this three steps: 1-Vertical's rows: I numbered the points in the ...
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1answer
29 views

Choosing number of points in Create Fishnet using ModelBuilder? [duplicate]

Is there a way of getting the analysis "create fishnet" to generate a grid of x number of points in ModelBuilder? For example, I wish to generate a grid consisting of for example 80 points within a ...
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0answers
96 views

Vector Grid shows big difference between cartesian and ellipsoid measurement

I am using QGIS 3.4.1 on Windows 10. Project CRS is EPSG:3857 (WGS 84/Pseudo-Mercator). I have defined a vector grid. Type is Rectangle (polygon). Horizontal and vertical distance is 50 m. Overlay is ...
4
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0answers
87 views

Showing Polar coordinate grid?

I've found some maps for Antarctica https://nga.maps.arcgis.com/home/webmap/viewer.html How can I show polar coordinate grid for it? I've got the grid source code in grid_wgs.js (I use OpenSeaMap ...
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0answers
25 views

Calculating route length per grid cell using fishnet

I have a problem determining the length of the routes (boat) I've surveyed in order to calculate the survey effort. I added the GPS points of the boat and then used the points to line tool and added a ...
2
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2answers
33 views

Labeling cells in fishnet using equivalent (“southeast”) vertices in grid using ArcGIS Desktop?

I have a large grid of 0.001-degree fishnet cells. I want to label each cell using the coordinates of its own southeast vertex. I have the coordinates for all the vertices in the entire grid, but I ...
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1answer
30 views

Expanding Grids in the border in ArcMap

I have a shapefile of a city. My problem is that in the border, cells of the grids are not a complete square (500*500 m), while I need them to be complete as I need their centroids too. As it is shown ...
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1answer
294 views

Can't display vector layer using L.vectorGrid.protobuf

I use mapbox/tippecanoe to create .pbf tiles. But when I try to display them using L.vectorGrid.protobuf nothing is rendered, although I see that proper .pbf files are requested and downloaded by ...
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0answers
40 views

Different variations of point-to-zone mapping

I have created a grid of 1Km2 over some census zones. Now, for each cell of the grid, I need to provide some characterization of it: population, socio-econ, etc. coming from the census zones. So, ...
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1answer
203 views

Sorting grid cells in fishnet grid by location and number using QGIS?

I am using QGIS 3.2.0 on a Mac (and also have QGIS 2), and I have a fishnet grid (probably created in Arc) that comprises of nearly 2 million grid cells. As a result, every change I make to the ...
2
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1answer
90 views

Speed up Geotools Vector Grid processing

I am using Geotools Vector Grid on a FeatureSource (shapefile) that been projected to "AUTO:42001". Units for the map are then in one meter increments. When the FeatureSource is a large country (like ...
2
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1answer
76 views

Find the NW vertex of a polygon

I am using QGIS 2.18 and I am wondering how to find the NW corner of a polygon and create an attribute of that point number. See the attached image. For example, please node 8 is the NW corner for ...
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0answers
30 views

Troubleshooting creation of equal-area fishnet inside rectangular polygon

I have a set of polygons that are rectangles (10 km by 1 km dimension), and I'm using Fishnet to create smaller polygons (which I'll call "boxes"). The boxes need to be equal area, so I am working in ...
2
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1answer
88 views

Creating time-space map by distorting city-points polygons using QGIS?

I've already 3 main layers on shp in qgis: the points of some places, the cities polygons and a grid of 10km, as you can see on the image. I would like to distort the map using time values to modify ...
5
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1answer
402 views

Turning vector grid into individual shapefiles using QGIS?

I am using QGIS and I created a vector grid on a crop field in order to cut it into plots. I want to save each grid cell into individual polygon shapefiles automatically. Here is an example of a ...
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0answers
32 views

MapInfo Printing Grid with Index

In Mapinfo Pro v17, how can I create a Map Grid with an Index (A1,B2, C3 etc) of a large area and generate a Map Series (Zoomed into the section for each region of the grid)? I have looked at ...
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1answer
262 views

Attribute Error: 'unicode' object has no attribute 'extent'

I keep getting this error from this line. arcpy.CreateFishnet_management(os.path.join(Output_Folder, "Full_Grid.shp"), str(NAR_U9.extent.XMin) + " " + str(NAR_U9.extent.YMin), str(NAR_U9.extent.XMin)...
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1answer
30 views

Syntax error in arcpy.CreateFishnet_management

I can't seem to find the syntax error in this line. Can anyone else find it? arcpy.CreateFishnet_management(Full_Grid, str(NAR_U9.extent.XMin) + " " + str(NAR_U9.extent.YMin), str(NAR_U9.extent.XMin) ...
2
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1answer
38 views

Calculating partial distances from whole segment in grid using QGIS?

I am using QGIS and trying to find a way to calculate partial distances of lines in a grid. In the left part of the picture you can see the sum of the line lengths within the grid cell (108.96...), ...
1
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1answer
101 views

Using Create Fishnet and Project in ModelBuilder?

When I try to run the model below, the Create Fishnet tool creates a huge grid that totally ignores the extent input (BLOCK_Project1). It's nowhere near the extent input either. If I click on the ...
1
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0answers
32 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 ...

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