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Portal for ArcGIS

Below you’ll find information about accessing and using the analysis tools. This information applies to all tools.

This topic discusses the standard spatial analysis tools available in the portal. For information about the GeoAnalytics Tools , see Perform analysis using ArcGIS GeoAnalytics Server . See Understanding analysis in Portal for ArcGIS for an overview of each toolset.

The administrator of your organization needs to grant you certain privileges for you to perform analysis. To use any of the analysis tools, you need the following privileges:

  • Create, update, and delete content
  • Publish hosted feature layers
  • Spatial Analysis

If you do not have these privileges, you will not see the Perform Analysis option as described below.

Certain tools need additional privileges such as Network Analysis and GeoEnrichment . See Perform analysis for more information about these tools.

To access and use analysis tools in the map viewer, follow these steps:

  1. Open a web map containing the feature layer or layers you want to analyze in the map viewer.
  2. Click the Contents button in the Details pane.
  3. You can do one of the following:
    • Click the Analysis button found on the map menu bar.
    • Alternatively, hover over the layer you want to analyze and click the Analysis button .

Both actions open the Perform Analysis pane.

The ArcGIS Python API allows GIS analysts and data scientists to query, visualize, analyze, and transform their spatial data using the powerful analysis tools available in their organization. To learn more about the analysis capabilities of the API, see the documentation site.

The standard feature analysis tools can be accessed via the Features module.

The Feature Analysis pane is illustrated below. This pane contains a number of categories and each category contains tools. To view the tools within a category, click the expand or collapse button on the left side of the category.

Open the Analysis Environments dialog box

Return to the Details pane.

Expand the category to view tools within.

View help about the category.

View help for the tool.

Analysis Environments are now available in Portal for ArcGIS to allow for GeoAnalytics Tools and Raster analysis, but can be used for Standard Tools as well. Processing Extent is the only environment that is used by Standard Tools . However, more environments will appear in the Analysis Environments pane if GeoAnalytics Tools and Raster analysis are enabled in your Portal.

To open an analysis tool pane, click the tool icon. This opens the tool’s pane as illustrated below with the Aggregate Points tool.

Open the Analysis Environments dialog box for the tool.

Close the tool pane without running the analysis and return to the Perform Analysis pane.

Get help about a parameter.

The result of running the analysis is saved to My Content using this name.

You can specify a folder in My Content in which to save the result.

If checked, only the data visible in the current map will be analyzed.

Analysis Environments can be set from the tool pane. Processing Extent is the only environment that is used by the Standard Tools . The Processing Extent applies to all tools, even when the extent is set from within a tool pane. The Use current map extent parameter will be unchecked when the Processing Extent is set. Checking Use current map extent will override the Processing Extent .

Each tool has a different set of parameters. You can always view help for a parameter by clicking the help icon next to the parameter as illustrated above. All tools have a Result layer name parameter where the results of running the analysis are written. You can change this name or use the default value.

It is recommended that you always check Use current map extent and that you zoom in to the area you want analyzed. Doing so limits the number of features the tool needs to examine when performing analysis. It also limits the number of credits that may be used by the tool if it is configured to use utility services from ArcGIS Online . If you uncheck Use current map extent , all features in the analysis layer will potentially be analyzed, and credits used by the tool will be based on the number of features in the layer.

Some tools only work on certain kinds of feature types; for example, Aggregate Points requires an input layer containing point features.

You have the following options when choosing a layer to analyze:

  • Choose a layer from your map.
  • Browse Layers to choose any layer in the portal to which you have access. Use this option if you want to access feature layers that contain more than one layer, such as the Esri boundary layers, as the Browse Layers dialog box allows you to choose an individual layer within the feature layer. If you do not choose an individual layer when running analysis, the tool uses the first layer it encounters.
  • Choose Living Atlas Analysis Layer or Choose Analysis Layer to view and select a layer from a preconfigured analysis group. If the portal administrator has configured the portal to access Living Atlas analysis layers, you will see the first option. If the portal administrator has configured the portal to access layers from a custom group, you will see the second option.

You can perform analysis on the following types of layers and data:

  • Feature service

The portal must be able to access the feature service; therefore, the URL to the service must either be publically accessible or within the same network as the portal and hosting server you use to run the analysis. You cannot perform analysis on layers based on nonaccessible feature services.

As with feature services, the map service must be publically accessible or within the same network as the analyzing portal and hosting server.

The layer must have the query capability enabled.

Most analysis tools run in the map viewer create hosted feature layers as output. These output layers are projected in the spatial reference of the input layer.

Portal for ArcGIS

Imagine your organization has been tasked to evaluate potential sites for a new warehouse. This evaluation is to be based on access to transportation, the presence of special restrictions such as nearby historical neighborhoods, access to restaurants and other facilities that employees may need, access to public transportation for employees, and nearby land use that may restrict or enhance development. How does your organization evaluate these sites in a quantifiable and defensible way? Of course, your organization needs data, but it also needs tools to analyze the data, measure geographic relationships, and help answer the question. This process is known as spatial analysis.

Many patterns and relationships aren’t always obvious from looking at a map. In some cases, there may be too much data to present coherently. The way you display the data on the map can change the patterns you see. Spatial analysis tools allow you to quantify patterns and relationships in the data and display the results as maps, tables, and charts. As of 10.4, these tools are available in Portal for ArcGIS . They allow you to provide portal members with a fast, accessible way to perform many common spatial analysis workflows.

The tools you’ll use to perform spatial analysis are actually hosted as a series of tasks in ArcGIS Server . To expose the tools to members of your portal, complete the steps in the Configure the portal to perform analysis section.

Members of your organization will have no direct interaction with ArcGIS Server ; they will only use the Portal for ArcGIS website to perform analysis. For example, members will use the analysis tools to perform common analytical functions such as finding hotspots, locating streets and addresses, finding a place, routing, or accessing a geodatabase. By enabling analysis, you empower members of your organization to answer questions and make important decisions using more than visual analysis.

To learn more about each tool, see the About the analysis tools section. To learn more about accessing and running the tools, see the Perform analysis section in the Portal for ArcGIS Help.

The spatial analysis tools are hosted as a series of tasks in ArcGIS Server . For members of your organization to use these tasks to perform analysis in Portal for ArcGIS , you’ll need to set up a base ArcGIS Enterprise deployment and grant members privileges to perform analysis. The portal’s hosting server does the work of processing analysis requests, storing the results in ArcGIS Data Store, and returning results to members in the Portal for ArcGIS website. You cannot use a hosting server configured with an enterprise geodatabase for this purpose.

The following instructions may require changes to the way you’ve deployed ArcGIS in your organization; review them carefully before proceeding. To configure the portal to perform analysis, follow these steps:

You can configure analysis for a portal that has been upgraded from an earlier version. Your portal must have a hosting server configured with ArcGIS Data Store . Follow the steps in Upgrade Portal for ArcGIS, and then go to My Organization > Edit Settings > Servers . Click Enable and save your settings. You can then proceed to step 5 below.

  1. If you do not already have a base ArcGIS Enterprise deployment configured, set one up. See Tutorial: set up a base ArcGIS Enterprise deployment for more details.
  2. Grant members privileges to perform analysis. Publisher and spatial analysis privileges are needed to perform analysis.
  3. Optionally, configure additional utility services with your portal. See the analysis tool descriptions below for more information about which tools require which additional utility services. Note that tools that require network utility services require that all of the network utility services be registered with the portal. For more information about the utility services, see About utility services.

The analysis tools are arranged in categories. These categories are logical groupings and do not affect how members of your organization access or use the tools in any way.

If the necessary utility services for a tool are not configured, the tool will not be visible in the portal user interface. The tool will also not be visible if a portal member does not have the correct permissions to use that tool.

The categories are as follows:

These tools calculate total counts, lengths, areas, and basic descriptive statistics of features and their attributes within areas or near other features.

This tool works with a layer of point features and a layer of area features. It first figures out which points fall within each area. After determining this point-in-area spatial relationship, statistics about all points in the area are calculated and assigned to the area. The most basic statistic is the count of the number of points within the area, but you can get other statistics as well.

For example, suppose you have point features of coffee shop locations and area features of counties, and you want to summarize coffee sales by county. Assuming the coffee shops have a TOTAL_SALES attribute, you can get the sum of all TOTAL_SALES within each county, or the minimum or maximum TOTAL_SALES within each county, or the standard deviation of all sales within each county.

This tool transfers the attributes of one layer or table to another based on spatial and attribute relationships. Statistics can then be calculated on the joined features.

For example

  • Join crime data to police districts using a spatial relationship.
  • Join land use descriptions to land use polygons using code values.

This tool finds features within a specified distance of features in the analysis layer. Distance can be measured as a straight-line distance or a selected travel mode. Statistics are then calculated for the nearby features.

For example

  • Calculate the total population within five minutes of driving time of a proposed new store location.
  • Calculate the number of freeway access ramps within a one-mile driving distance of a proposed new store location to use as a measure of store accessibility.

Travel mode distance calculations require that you configure the portal to use network utility services and grant the Network Analysis privilege to those members who need to run the tool.

This tool finds features (and portions of features) within the boundaries of areas in the analysis layer.

For example

  • Given a layer of watershed boundaries and a layer of land-use boundaries by land-use type, calculate total acreage of land-use type for each watershed.
  • Given a layer of parcels in a county and a layer of city boundaries, summarize the average value of vacant parcels within each city boundary.

These tools find features that pass any number of criteria that you specify. They are typically used for site selection, where the objective is to find places that satisfy multiple criteria.

Find Existing Locations

This tool selects existing features in your study area that meet a series of criteria you specify. These criteria can be based on attribute queries (for example, parcels that are vacant) and spatial queries (for example, parcels within 1 mile of a river).

Derive New Locations

This tool derives new features in your study area that meet a series of criteria you specify. These criteria can be based on attribute queries (for example, parcels that are vacant) and spatial queries (for example, parcels that are within flood zones).

Find Similar Locations

Based on criteria you specify, the Find Similar Locations tool measures the similarity of locations in your candidate search layer to one or more reference locations.

This tool creates areas were an observer can see objects on the ground. The input analysis points can represent either observers (such as people on the ground or lookouts in a fire tower) or observed objects (such as wind turbines, water towers, vehicles, or other people). The result areas are those areas where the observers can see the observed objects and vice versa: the observed objects can see the observers. The output is typically used in site suitability and selection analysis.

This tool requires you to configure elevation and hydrological service items for the portal, and grant the Elevation Analysis privilege to any members who need to run the tool.

Your portal administrator must configure elevation and hydrological service items for the portal, and grant you the Elevation Analysis privilege to allow you to run this tool.

This tool identifies catchment areas based on locations that you specify.

This tool requires you to configure elevation and hydrological service items for the portal, and grant the Elevation Analysis privilege to any members who need to run the tool.

Your portal administrator must configure elevation and hydrological service items for the portal, and grant you the Elevation Analysis privilege to allow you to run this tool.

This tool determines the trace, or flow path, in a downstream direction from the points in your analysis layer.

This tool requires you to configure elevation and hydrological service items for the portal, and grant the Elevation Analysis privilege to any members who need to run the tool.

Your portal administrator must configure elevation and hydrological service items for the portal, and grant you the Elevation Analysis privilege to allow you to run this tool.

These tools help you explore the character of areas. Detailed demographic data and statistics are returned for your chosen areas. Comparative information can also be reported for expanded areas such as counties and states.

This tool enriches your point or area data by getting facts about the people, places, and businesses that surround your data locations. Enrich Layer enables you to answer new questions about locations that you cannot answer with maps alone; for example, What kind of people live here? What do people like to do in this area? What are their habits and lifestyles? What kind of businesses are there in this area?

The result will be a new layer containing all demographic and geographic information from given data collections. This new information is added as fields in the table.

This tool requires a GeoEnrichment utility service, and any members who need to run the tool require the GeoEnrichment privilege. Additionally, travel mode distance calculations require that you configure the portal to use network utility services and grant the Network Analysis privilege to those members who need to run the tool.

These tools help you identify, quantify, and visualize spatial patterns in your data by identifying areas of statistically significant clusters.

The Calculate Density tool creates a density map from point or line features by spreading known quantities of some phenomenon (represented as attributes of the points or lines) across the map. The result is a layer of areas classified from least dense to most dense.

For example

  • Calculating densities of hospitals within a county. The result layer will show areas with high and low accessibility to hospitals, and this information can be used to decide where new hospitals should be built.
  • Identifying areas that are at high risk of forest fires based on historical locations of forest fires.
  • Locating communities that are far from major highways in order to plan where new roads should be constructed.

The Find Hot Spots tool will determine if there is any statistically significant clustering in the spatial pattern of your data.

For example

  • Are your points (crime incidents, trees, traffic accidents) really clustered? How can you be sure?
  • Have you truly discovered a statistically significant hot spot (for spending, infant mortality, consistently high test scores), or would your map tell a different story if you changed the way it was symbolized?

The Find Hot Spots tool will help you answer these questions with confidence.

The Find Outliers tool will determine if there are any statistically significant outliers in the spatial pattern of your data.

For example

  • Are there anomalous areas in the pattern of your data (crime incidents, trees, traffic accidents)? How can you be sure?
  • Have you truly discovered a statistically significant outlier (for spending, infant mortality, consistently high test scores), or would your map tell a different story if you changed the way it was symbolized?

The Find Outliers tool will help you answer these questions with confidence.

The Interpolate Points tool allows you to predict values at new locations based on measurements from a collection of points. The tool takes point data with values at each point and returns areas classified by predicted values.

For example

  • An air quality management district has sensors that measure pollution levels. Interpolate Points can be used to predict pollution levels at locations that don’t have sensors, such as locations with at-risk populations—schools or hospitals, for example.
  • Predict heavy metal concentrations in crops based on samples taken from individual plants.
  • Predict soil nutrient levels (nitrogen, phosphorus, potassium, and so on) and other indicators (such as electrical conductivity) in order to study their relationships to crop yield and prescribe precise amounts of fertilizer for each location in the field.
  • Meteorological applications include prediction of temperatures, rainfall, and associated variables (such as acid rain).

These tools help you answer one of the most common questions posed in spatial analysis: What is near what?

A buffer is an area that covers a given distance from a point, line, or area feature.

Buffers are typically used to create areas that can be further analyzed using a tool such as Overlay Layers . For example, if the question is What buildings are within 1 mile of the school?, the answer can be found by creating a 1-mile buffer around the school and overlaying the buffer with the layer containing building footprints. The end result is a layer of those buildings within 1 mile of the school.

Create Drive-Time Areas creates areas that can be reached within a specified drive time or drive distance. It measures out from one or many points (up to 1,000), along roads, to create a layer that can help you answer questions such as the following:

  • Where can I go from here within a 30-minute drive?
  • Where can I go from here within a 30-minute drive at 5:30 p.m. during rush hour?
  • What areas of town can the fire department reach within 5 minutes?
  • How would fire-response coverage improve by building a new fire station here?
  • What market areas does my business cover?

You may be able to answer your questions solely through visualizing the output areas. Alternatively, you can perform further spatial analysis using the output areas. For instance, running Aggregate Points using drive-time areas with demographic data can help determine which potential store location would likely provide the best customer base for your type of business.

You must configure network utility services on the portal and grant members the Network Analysis privilege to allow them to run this tool.

This tool finds the nearest features and, optionally, reports and ranks the distance to the nearby features. To find what’s nearby, the tool can either measure straight-line distance or a selected travel mode. There are options to limit the number of nearest features to find or the search range in which to find them.

The results from this tool can help you answer the following kinds of questions:

  • What is the nearest park from here?
  • Which hospital can I reach in the shortest drive time? How long would the trip take on a Tuesday at 5:30 p.m. during rush hour?
  • What are the road distances between these major cities?
  • Which of these patients reside within 2 miles of these chemical plants?

Find Nearest returns a layer containing the nearest features and, optionally, a line layer that links the start locations to their nearest locations. The optional line layer contains information about the start and nearest locations and the distances between.

To allow members to find nearby features using most of the available travel modes, your inputs must be point features and you must configure network utility services for the portal and grant members the Network Analysis privilege. You can, however, measure by Line Distance without this privilege.

Plan Routes determines how to efficiently divide tasks among a mobile workforce.

You provide the tool with a set of stops and the number of vehicles available to visit the stops. The tool assigns the stops to vehicles and returns routes showing how each vehicle can reach their assigned stops in the least amount of time.

With Plan Routes , mobile workforces reach more jobsites in less time, which increases productivity and improves customer service.

  • Inspect homes, restaurants, or construction sites.
  • Provide repair, installation, or technical services.
  • Deliver items and small packages.
  • Make sales calls.
  • Transport people from their homes to an event.

The output from Plan Routes includes a layer of stops coded by the routes to which they are assigned, a layer of routes showing the shortest paths to visit assigned stops, and, depending on whether any stops could not be reached, a layer of unassigned stops.

You must configure network utility services on the portal and grant members the Network Analysis privilege to allow them to run this tool.

This tool measures the travel time or distance between pairs of points. The tool can report straight-line distances, road distances, or travel times. You provide starting and ending points, and the tool returns a layer containing route lines, including measurements, between the paired origins and destinations. If many origins go to one destination, a table summarizing multiple trips to the destination is included in the output.

You must configure network utility services on the portal and grant members the Network Analysis privilege to allow them to run this tool.

These tools are used for both the day-to-day management of geographic data and for combining data prior to analysis.

With this tool, you can select and download data for a specified area of interest. Layers that you select will be added to a ZIP file or layer package.

Areas that overlap or share a common boundary are merged together to form a single area.

You can control which boundaries are merged by specifying a field. For example, if you have a layer of counties, and each county has a State_Name attribute, you can dissolve boundaries using the State_Name attribute. Adjacent counties will be merged together if they have the same value for State_Name . The end result is a layer of state boundaries.

This tool copies features from 2 layers into a new layer. The layers to be merged must all contain the same feature types (points, lines, or areas). You can control how the fields from the input layers are joined and copied.

For example

  • I have 3 layers for England, Wales, and Scotland, and I want a single layer of Great Britain.
  • I have 12 layers and each contains parcel information for contiguous townships. I want to join them together into a single layer, keeping only the fields that have the same name and type on the 12 input layers.

Overlay Layers combines 2 or more layers into 1 single layer. You can think of overlay as peering through a stack of maps and creating a single map containing all the information found in the stack. In fact, before the advent of GIS, cartographers would literally copy maps onto clear acetate sheets, overlay these sheets on a light table, and hand draw a new map from the overlaid data. Overlay is much more than a merging of line work; all the attributes of the features taking part in the overlay are carried through to the final product. Overlay is used to answer one of the most basic questions of geography: What is on top of what?

For example

  • What parcels are within the 100-year floodplain? (Within is just another way of saying on top of.)
  • What roads are within what counties?
  • What land use is on top of what soil type?
  • What wells are within abandoned military bases?

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    Источники:
    Portal for ArcGIS
    How to access and use the online analysis tools.
    http://server.arcgis.com/en/portal/latest/use/use-analysis-tools.htm
    Portal for ArcGIS 1
    By enabling analysis, you empower members of your organization to answer questions and make important decisions using more than visual analysis.
    http://server.arcgis.com/en/portal/latest/administer/windows/configure-the-portal-to-perform-analysis.htm
    Анализ портала
    анализ портала Создавая и развивая Портал Знаний, мы надеемся, что пользователи самых разных профессий найдут здесь полезные знания и практические решения, позволяющие применять аналитику и
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