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Questions tagged [vector-grid]

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

1
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0answers
53 views

How to assign a grid value to points? [duplicate]

I would like to create a grid (say 10mx10m) with unique values (i.e. grid 1,2,3,4) and then overlay a point file and assign a grid value to each point. All points within the first grid have field grid ...
2
votes
4answers
2k views

How can I generate a fishnet grid and a matrix of percentage of overlapping in R?

I'm trying use R for create a fishnet grid like in arcGIS with many cells of same size. In the arcGIS 9.3 we have the option of create a polygon with many small square polygons (eg. 1 x 1 degree of ...
31
votes
4answers
22k views

Overlay a spatial polygon with a grid and check in which grid element specific coordinates are located

How can one use R to split a shapefile in 200 meter squares/sub-polygons, plot this grid (incl. ID numbers for each square) over the original map below, and evaluate in which square specific ...
0
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1answer
24 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. ...
2
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1answer
40 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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0answers
40 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
30 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
75 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?
0
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1answer
17 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 ...
4
votes
2answers
4k views

Create a polygon grid using with Geopandas

I'm working with a geodataframe of points and I need to create a grid of rectangular polygons. I know how to have bounds of the geodataframe with gdf.geometry.bounds. Now using this information and ...
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0answers
142 views

Georeferencing lat/lon .png map and adding grid using lat/lon? [closed]

I'm trying to input a .png map into my QGIS project for a small area in South Africa. I don't know the CRS used to create the map but it has a grid system on it with the lat/lon labelled (created ...
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1answer
46 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 ...
1
vote
1answer
58 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 ...
0
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0answers
21 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 ...
0
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1answer
40 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 ...
1
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0answers
36 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, ...
1
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1answer
84 views

Assigning fishnet attributes by row instead of by column with ArcPy?

I created a fishnet grid and assigned numeric attributes 1-16 to a new field using the arcpy.da.UpdateCursor function. It however assigned the attributes north to south (see image). How can I change ...
11
votes
4answers
10k views

Creating regularly spaced, defined # of points within polygon in QGIS

I used the research tool "Regular Points" to produce a certain number of points within a polygon, but it forms a rectangular grid of points rather than only within the shape of the polygon. Since I ...
2
votes
2answers
76 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 ...
0
votes
1answer
18 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 ...
4
votes
2answers
688 views

Selecting a set number of points within polygon grid cells

I have a polygon grid with 1 square kilometer area cells, and over it a set of points, like so: What i need to do is select and extract only a single random point per grid cell. I could do that ...
1
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2answers
37 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 ...
20
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4answers
30k views

Creating fishnet grid Shapefile in QGIS?

How do I create a fishnet shapefile using QGIS? The equivalent task of "Create Fishnet" in ArcGIS.
0
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1answer
33 views

Preventing ArcMap from labeling when creating grids?

I am using the Create Polygon Grid Wizard to make a large number of grids. Is there anyway I can stop ArcMap from drawing the grid labels as they are created? It seems to take much much longer to ...
0
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0answers
58 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
votes
1answer
401 views

Seeking algorithm in QGIS Process Modeller to create vector grid?

I am using Process Modeller to automate merging several vector layers and then creating a grid to cover the extent of the merged layer. There are functions which already exist which are not listed in ...
2
votes
1answer
62 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 ...
3
votes
1answer
253 views

Creating grid with statistics of merged shapefiles in QGIS?

I operate with QGIS. I have to split the shape files of the buildings and the roads of a city into a grid of 500x500m per square and into each square I have to obtain the total free area, the total ...
2
votes
1answer
66 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 ...
0
votes
1answer
130 views

Creating single squared tile fishnet buffer based off shapefile in ArcGIS Desktop?

I'm interested in creating a fishnet buffer around a current grid I have. The fishnet buffer I'm interested in making needs to be exactly the same cell size and extend just one grid cell around the ...
1
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0answers
98 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 ...
0
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1answer
26 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 ...
4
votes
1answer
304 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 ...
2
votes
2answers
28 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 ...
1
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0answers
49 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
65 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
19 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
votes
2answers
364 views

Calculating density map of cycleways using fishnet in ArcGIS Desktop?

How can I calculate density map of cycleways (line feature) which refers to net grid in ArcGIS? Result by using function Line Density in ArcGIS for me is not satisyfing. I created reference grid net ...
3
votes
1answer
706 views

Route through water polygons

I have a water-polygon grid shape file as shown (Each grid is 1latx1long): I have created this in QGIS and files (coastal lines and land polygons) selected from http://openstreetmapdata.com/data ...
0
votes
1answer
28 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 ...
0
votes
1answer
167 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 ...
2
votes
1answer
61 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 ...
0
votes
1answer
127 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 ...
1
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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, ...
2
votes
1answer
70 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
24 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 ...
3
votes
3answers
664 views

Determining Y coordinate for Create Fishnet from desired Angle of Rotation using ArcPy/Python?

In How Create Fishnet works from the ArcGIS Help it says: Calculating a value for the y-axis coordinate If you know the angle of rotation, you can compute a value for the Y-Axis Coordinate parameter ...
4
votes
2answers
137 views

Uncertainty of a line between two coordinates with uncertainties in QGIS

I am trying to plot the uncertainty of a line between two coordinates with uncertainties. I have created polygons around 2 coordinates to represent the uncertainty region around each point. I then ...
0
votes
0answers
25 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 ...
1
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1answer
513 views

Creating an equidistant grid in ArcGIS for Desktop?

I am new at GIS, however, I need to create this grid with equidistant boxes similar to graph paper such that these can show approximate distance around different types of places. How do I do it? I ...