An arrangement of quantities, symbols or objects in rows and columns; a matrix

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-1
votes
2answers
55 views

Perform band calc in numpy array

I'd like to perform a band calc in some raster bands. What I am trying to do is import the raster (ENVI format) like array with gdal, then I do the calc but when I try to save the raster I get an ...
3
votes
1answer
76 views

Optimizing Python GDAL ReadAsArray

I am using the GDAL ReadAsArray method to work with raster data using numpy (specifically reclassification). As my rasters are large, I process the arrays in blocks, iterating though each block and ...
2
votes
1answer
105 views

What is the purpose of arcpy.Array()?

I am wondering what the purpose of arcpy.Array() is. It seems an intermediate step between creating a list of objects and performing some sort of conversion, for example, such as in the sample code ...
0
votes
1answer
38 views

How to use an array for buffer

I want to to use an array to create 3 buffer files with different buffer distances. The code should produce 3 buffer files in one step. Additionally, the code below runs already after using an ArcGIS ...
3
votes
0answers
31 views

Why does my Validation Script continue to run when adding the result to the map?

I am in the process of developing a python script that creates a list available imagery for our project areas that would then allow the user to choose which imagery source they would like to add to a ...
2
votes
0answers
82 views

Load Multiple WFS layers from array with OpenLayers

looking for some help here. I have a layer on my Geoserver that contains a few dozen pipeline alignments in a single layer. My goal is to get those into the map frame as individual layers by ...
2
votes
0answers
493 views

Finding coordinates from a nested grid as a numpy array

So this is a pretty basic question, but I'm trying to figure it out. I've written a script that allows a user to read in a raster and provide a cell resolution, and outputs the amount of cells ...
1
vote
0answers
18 views

how to generate a raster with its spatial reference from an array(or matrix) by using pyqgis

I used arcgis to generate rasters from txt files by a certain python api,but i am not familiar with qgis,and now i need generate some rasters from txt files by using pyqgis.The resulting rasters ...
1
vote
0answers
70 views

Open Layers 3 Dynamically or Batch Add Layers from user folder

I would like to dynamically load all layers (kml, for instance) from a user's folder to a group map. ...This likely requires an iteration that searches the folder and adds the layers to the users' ...
1
vote
0answers
137 views

Using gdal ReadAsArray or Arcpy.RasterToNumPyArray on python 2.6 32bit without it crashing

I am trying to run ReadAsArray on an entire raster and on a single band, python will crash without an error message when trying to do either. Is there a way I can create a 3d array without having to ...
1
vote
0answers
118 views

How to count the number of coordinates within x meters grouping by distinct ids?

I have a table "items" of about 1 million rows and 40.000 distinct ids like the following: idx | id | point | lat | lon | the_geom 1 | 1 | 76 | 51.463388 | -0.16869856 | 0101000020E... 2 | 1 | 53 | ...
0
votes
0answers
69 views

reading raster without making QGIS apply the scale factor to the raster

Since QGIS multiplies the image with the scale factor when reading, it messes up the image if the scale factor is not properly defined to the data as QGIS expected. For example, I am reading MODIS ...
0
votes
0answers
13 views

Arrangement of vectors and matrix in text file?

My ASCII file has a vector of latitudes, and the indices of those latitude values tie latitude values to the data sharing the same index. That is, if given: latitude[x=0,1,2,3] = 10, 20, 30, 40 ...
0
votes
0answers
34 views

Identify task on multiple layers into a pop up window with the arcgis javascript api

I am trying to create a pop up window when I click on a feature included in my map that displays their attributes. I want it to apply to all visible layers. So far this is a working section of code I ...
0
votes
0answers
59 views

Adding Array of strings in File geodatabase feature-class' field

I need to include array type in file geodatabase/shapefile field's content so that when i expose it as a map service, i can get array instead of string or integer. e.g., i got fields: OBJECTID, ...
0
votes
0answers
96 views

Python error in array declaration

I am getting a error as follows File "C:\Program Files (x86)\ArcGIS\Desktop10.3\ArcPy\arcpy__init__.py", line 2292, in NumPyArrayToRaster return _NumPyArrayToRaster(*args, **kwargs) ValueError: ...
0
votes
0answers
73 views

Create RasterDataSet from 2d array

How i can create RasterDataset using a 2D double array : double[][] pixels OR float[][] i tried tow ways using IRasterDataset 1- IPixelBlock outBlock = outRawPixel.createPixelBlock(pnt); ...
0
votes
0answers
73 views

Routes through centroids and array functions

I have a table stopcentroids4 like in figure with the following fields: gid, routes, geom and i want to draw a line for each route that runs through centroids. In my code there is a mistake. ...
0
votes
0answers
157 views

Array to Feature Class and XYZ to Table Issues

I am trying export vertices of a line to a point feature class using the code below. I am using ArcGIS 10.2.2 and do not have access to Spatial, 3D, or Network analyst. I used ET GeoWizards to export ...
0
votes
0answers
146 views

finding length of a custom type array in mapbasic

Hello I am just getting started with MapBasic and I have run in to some trouble trying to count the items in a custom type i have tried accomplishing this by running a loop until an error occur. ...
0
votes
0answers
461 views

OpenLayers LineString: Not displaying the line (array of points)

I'm perplexed as to why tail_path is not drawing the line (can't see anything on the map) but the alert seems to be returning the correct data. var path_travelled = new Array(); var path = ...